24 In cats the allele for short hair is dominant H to the.pdf

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2.4 In cats the allele for short hair is dominant (H) to the allele for long hair (h). A short-haired cat that is heterozygous is crossed with a longhthaired cat. Use a genetic cross to determine the percentage chance of the offspring being heterozygous for hair length. (6) 2.2 In dogs rough hair ( H) is dominant to smooth hair (h). A heterozygous roughhaired dog is mated with a smooth-haired dog. Represent a genetic cross to show the phenotypic ratio of the pupples. (6) 2.2 A grey (G) male rabbit was mated with an albino (g) female rabbit. The entire F1 generation was grey. Use a genetic cross to show the phenotypic ratio of their offispring if one of the males of the F1 generation was mated with an albino female. (7) 2.1 In rabbits, black fur is produced by the allele (B) and white fur by the allele (b). The table below shows the genotypes of some rabbits. 2.1.1 What is the phenotype: (a) Produced by the recessive allele (b) Of rabbit 2 2.1.2 Give the NUMBER only (1, 2 or 3 ) of the rabbit(s) that is/are: (a) Pure-bred (b) Homozygous dominant (3) 2.1.3 Use a genetic cross to show the percentage chance of rabbits 1 and 3 having offspring with white fur. (6)2 In rabbits the dominant allele (B) produces black fur and the recessive allele (b) produces white fur Study the genotypes of four rabbits 22.1 Give the phenotypes of (a) Rabbit 2 (1) (b) Rabbit 4 222 State the genotypic ratio that is stomn in the table above. 223 If rabbits 1 and 4 were mated together and had 12 offspring, how many of these would you expect to be black? 224 Rabbit 3 was allowed to breed with rabbit 4 Use a genetic cross to show the possible phenotypes and genotypes of the F1 generation for fur colour. (6) 1 In rabbits the dominant allele (B) produces black fur and the recessive allele (b) produces white fur. Study the tabie below showing the genotypes of four rabbits. 3.1.1 What are the phenotypes for rabbits 2 and 4 , respectively? (2) 3.1.2 State the genotypic ratio that is shown in the table above. 3.1.3 If rabbits 1 and 4 mated and had 18 offspring. how many of these would you expect to be biack? 3.1.4 Rabbit 2 was allowed to mate with rabbit 4 . Represent a genetic cross to show the possible phenotypes and the genotypes of the F1 generation for fur colour. (6) (10).

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tgat is everything b. Draw a Punnett square to illustrate a crons between a birch hetenomygous for bark colour and trunk searring and a birch homory 6 ous recevise for both characteristios Give the rerulting genotypic and phenotypic ratios of the offspring of this cross. c. After prealatigg the results of the cross in part b. the actual cross between these white birch was carried out and resulted in the following numbers of offspring: 92 white bark, scarred trunk 96 grey bark, unscarred trunk 5 white bark, unscarred trunk 7 grey bark, scarred trunk Calculate the phenotypic and genotypic ratios of these offispring- How do these results compare to your predicted ratios above? You began this question with the assumption that the genes responsible for bark colour and trunk scarring were locared on separate chromosomes. Do the observed results support this assumption? Explain what these results mean and why you can make that conclusion. 8. A local farmer, plagued by roving herbivores, has decided to befriend a new herd of White-Tailed Deer (Odocoileus vinginiamus). Having taken a number of genetics courses during his Agriculture degree, the farmer decides to observe the heritability of a couple of phenotypic traits. In these deer, a white patch on the chest (R) is dominant to not having a patch ( r, and white spots along their side (T) are dominant to no spots(t). After a particularly hot summer, the farmer notices a new male deer in the area that looks to have been trapped by a forest fire- it's fur is badly singed, and none of the typical colouration is visible.Based on this, what are the genorypes of the gametes from an organism with the genotype QqRr ? Trae or False: These gametes will all be equally likely. 4. What are the two uses for a test cross? 3. a. 5. Give an example of a phenotypic frequency: 6. Give an cxample of a genotypic ratio: 7. In White birch (Bernila papyrifena, a species of tree), white bark (B) is dominant to grey bark (b), and the presence of black trunk scars (E) is dominant to an unscarred trunk (e). a. Assuming that these genes are located on separate chromosomes, draw a Punnett square to illustrate a cross between a birch homozygous for white bark and a scarred trunk and a birch with grey bark and unscarred trunk. What are the resulting genotype and phenotype of the F1 ?Give the realting genotypic and phenotypie ratios of the offipring of this crows. c. After prraictivg the results of the cross in part b, the actual cross between theie. white birch was carried out and reulied in the following number of otfopring 92 white bark, scurred trunk 96 grcy bark, unscarred trunk 5 white bark, unscarred trunk 7 grey bark, scarrod trunk Calculate the phenotypic and genotypic ratios of theie offspring. How do these remults compare to your predicted ratios above? You began this question with the assamption that the genes responsible for bark colour and trunk scarring were located on separate chromosomes. Do the observed resalis sup.

BI 211 Graded problem set 9 The drosophila alleles for black.pdf

advanceneruroscience

BI 211 Graded problem set 9 The drosophila alleles for black body (instead of the normal tan color, which is the wild type) and curved Wings (instead of the wild-type straight wings) are both recessive and on chromosome 2. Gene "C" designates color, with alleles C representing the dominant tan allele and c representing the recessive black allele, while gene " W " designates the wing shape gene with W being the dominant straight allele and w the recessive curved allele. You want to discover how close together these two genes are on chromosome 2. You place one male from a pure breeding stock and one female from a pure breeding stock (these are the 'parental' flies) into vial 1. The offspring of this cross (cross 1) hatch in vial 1 . These F1 offspring are heterozygous for both genes. 1. What is (are) the genotype(s) of the offspring of cross 1 (the F1 flies)? b. To perform the mapping experiment, you select a single male with the genotype coww and place it into a vial you label 'vial 2' along with a female F1; this is cross 2 . You get 500 offspring in vial 2 (these are the F2 fies). Among these F2 flies, 65 have tan bodies and curved wings, 70 have black bodies and straight wings, 190 have black bodies and curved wings, and 175 have tan bodies and straight wings. What are the genotypes of offspring with parental phenotypes (hint there are twol). Show your work. c. What are the genotypes of the recombinant offspring (hint: there are also twol). d. Two true breeding parents (parents of cross 1) gave rise to the F 1 flies in vial 1. What is the genotype of each parent? parent 1: parent 2: e. What is the percent of recombinants for these two genes? Show your work..

1- An allele of a gene that confers musical ability is identified in a (1).docx

Edwardk3aWallacey

1. An allele of a gene that confers musical ability is identified in a family. All 5 children received this allele from their father and are confirmed heterozygotes. 2 children play the piano relatively well, 2 play the piano and guitar well, and 1 child is a piano, flute, and clarinet virtuoso. Based only on the information given, which of the following genetic phenomena best describes this trait? (1 point) a. anticipation b. incomplete dominance c. incomplete penetrance d. overdominance e. variable expressivity 2. The human bone disease osteogenesis imperfecta (OI) is due to a dominant allele that is incompletely penetrant in heterozygotes. The Penetrance value for this genotype is currently estimated to be 0.7. A new born girl has been determine to be heterozygous for this gene. What is the probability that she will not develop OI? (1 point) a. 0.15 b. 0.30 c. 0.35 d. 0.70 e. 1 3. In a particular species of fox, coat color can be grey, red or brown. When pure-breeding foxes with grey coats are mated with pure-breeding foxes with red coats, all F 1 progeny have red coats. Mating F 1 foxes produces 105 foxes with red coats, 77 foxes with brown coats, and 12 foxes with grey coats. Based on the observed data, what is the most likely genetic basis for the inheritance of coat color in foxes? (1 point) a. multiple alleles of a gene b. one allele of the gene responsible for the trait is acting as a lethal allele c. epistasis d. incomplete dominance e. codominance 4. You have leamed that the appearance of scurs in cattle is a sex-influenced trait. A cow (i.e. a female) who is homozygous with the non-scurs allele is mated to a bull (i.e. a male cow) who is heterozygous for this gene. What is the probably that their first offspring will not have scurs? (1 point) a. 0 b. 1/4 c. 1/2 d. 1/4 e. 1 5. In cats, the dominant allele of one gene can result in no tail (or a very short tail), and this is referred to as the Manx phenotype. A recessive allele of the gene results in normal tail length. Embryos that are homozygous for the Manx allele die during early embryonic development. A cat with a normal tail is crossed to a cat with a Manx tail. What is expected offspring outcome from this cross? (1 point) a. All kittens will have a short tail b. All kittens will have a normal tail c. 1/2 the kittens will have a normal tail and 1/2 will have a short tail d. 2/3 of the kittens will have a short tail gad 1/3 will have a long tail e. 3/4 of the kittens will have a short tail ard 1/3 will have a long tail .

A- Mendelian Genetics Questions 1- In pea plants a purple flower (P) i.docx

Oliver2tCClarkj

A. Mendelian Genetics Questions 1. In pea plants a purple flower ( P ) is dominant and a white flower ( p ) is recessive. a. What is the genotype of a pure hreeding white plant? b. If a pure brecding purple plant is crossed with at pure breeding white plant, what phenotype is expected for the offspring? 2. In pea plants a tall plant (T) is deminant and a short plant ( t ) is recessive. a. Use a Punnett square to show the cross between two heterory gous tall plants. Parent genotypes: b. What would be the predicted genotype and phenotype ratios of the offipping? Cieastype Matid Fhrefype Matie 3. In hamsters, black hair ( B ) is dominant to brosin hair (b) and shott hair (H) is dominant to long hair (h). A black, long-haired hamster (Bbhh) is erossed with a brown, short-haired hamster (bbHh). a. What pereentage of the offspring will be brown with long hair? Use a Punnett square to show the genotype and phenotype ratios of the offspring. 4. In rabbits, white coaf color ( C a ) and black coat color ( C A ) are codominant, and both of these alleles are dominant over albino (c). Helerovygotes ( C C ) are spored. c. Use a Punnet square to show the genocype and phenotype ratios of the oflspring from a heterorygous black-coated rabbit and a bornorygous white-coated rabbit. Wivary or Rot Panoyer Rosit 5. In plants known as "four d'elocks", the allele for red fower color is incompletely deminast over the allele for white flower coloe. Heterorygous pink flewered four "elocks were allowed to self-pollinate. c. Use a Punnett square to show the genotype and phcnotype ratios of the offlspring. d. In theory, what pereeti of the offipping would be penk? Perecntage pink? 6. Skin color in humans is determined by a (ctadient fult itr the blanti). inberitance system, possibly involving as many as 9 genes. For simplicity let ins consider the inflwence of 2 genes: A and B , where the dominant allele (upper case A or B) darkens skin colot. Suppose a woman who is AABb reprodnces with a man who is Aabb: b. List all of the possible genetypes of the pametes that could be produced by each parent. c. Use a Punnet square to show the genathpe ratio of the oflispring. .

GeneticsMarthese Azzopardi

INET Lab Genetics Worksheet Report Template1© Access L.docx

dirkrplav

INET Lab Genetics Worksheet Report Template 1 © Access Learning Systems Student: Email: Date: For each correctly conducted genetics problem, you receive 5 points for a maximum 20 points. All Punnett squares must be shown. 1. There are 3 alleles controlling the ABO blood types. IA and IB are codominant genes so that the combination IAIB produces the AB blood type. The third allele, (i) is recessive to the other two alleles. Show your work for each cross. Indicate which of these parents could produce the given child. The first one is provided with answers as an example. (HINT: Do not forget that a heterozygous versus a homozygous blood type may yield different results.) a) Parent Child A x AB B IA IB IA IA IA IA IB IA IA IA IA IB IA IB IA IA IA IA IB i IA i IB i Produce Child of Type? No Produce Child of Type? Yes b) Parent Child A x O A Produce Child of Type? Produce Child of Type? c) Parent Child A x B O Produce Child of Type? Produce Child of Type? Produce Child of Type? Produce Child of Type? d) Parent Child A x AB O Produce Child of Type? Produce Child of Type? e) Parent Child B x B O Produce Child of Type? Produce Child of Type? Produce Child of Type? f) Parent Child AB x AB A Produce Child of Type? 2. The allele for albinism (a) is recessive to the allele for normal pigmentation (A). A normally pigmented woman whose father is an albino marries an albino man whose parents are normal. They have three children, two normal and one albino. Give the genotypes for each person listed. Prove your answer. # Relationship Genotype(s) 1 Paternal Grandfather 2 Paternal Grandmother 3 Maternal Grandfather 4 Maternal Grandmother 5 Father 6 Mother 7 Child 1 8 Child 2 9 Child 3 3 4 1 2 5 6 7 9 8 a) Show the cross of the paternal grandparents. (HINT: What must their genotypes be to produce and albino child?) b) What are the possible genotypes of the maternal grandmother? c) Show the cross of the mother and father. 3. In horses, black coat color is influenced by the dominant allele (B), and chestnut coat color by the recessive allele (b). a) What color horse would you use to find out the genotype of a black trotter? 6 5 b) Give the genotype and phenotype. Show your work and discuss the reason you would know the genotype of the black horse. Possible Allele Pairings with Homozygous Dominant Trotter F1 offspring probabilities: Possible Allele Pairings with Heterozygous Trotter F1 offspring probabilities: Reasoning: 4 5 4. In Drosophila, the fruit fly, white eyes are determined by a recessive X-linked gene, and the wild-type or normal brick-red eyes are due to its dominant allele. Use symbols of the f.

24. Which of the following is an example of sanitization? A) A public toilet is treated with disinfectants. B) A surgeon washes her hands before surgery. C) Heat is used to kill potential pathogens in apple juice. D) An autoclave is used to prepare nutrient agar. 25. Honey can be stored at room temperature for long periods of time because it A) is highly acidic. B) is hypertonic. C) is a natural surfactant. D) contains lysozyme. 26. The major production of ATP during aerobic metabolism occurs when electrons from and transferred to A. FADH2, NADH,H20 B. O2,FADH2, NADH C. FADH2, O2, NADH D. FADH2, NADH,O2 27. Which one of the following is not produced in any of the steps of glycolysis? A) NAD+ B) NADH C) pyruvic acid D) ATP 28. In batch culture one reason the exponential phase of bacterial growth comes to an end is: a. organisms run out of space b. uptake enzymes become saturated c. metabolism is exceeded d. nutrients are used up 29. Catabolism refers to 30. Anabolism refers to a. synthesis of cell structures b. transfer of electrons c. uptake of nutrients d. breakdown of chemicals to yield energy 31. O2;OH2, and H2O2 are: a) essential to the growth of obligate aerobes b) high energy intermediates c) toxic O2 byproducts d) fixed electron carriers.

24 What defines a pest Give 5 examples of different kind.pdf

24 In cats the allele for short hair is dominant H to the.pdf

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24 In cats the allele for short hair is dominant H to the.pdf