In which generation is a recessive deleterious allele MOST likely to.pdf

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In which generation is a recessive deleterious allele MOST likely to negatively affect the fitness of the individual expressing it?gametophyteequally likely in both sporophyte and gametophytehighly improbable in both generationssporophyteIn which generation is a recessive deleterious allele MOST likely to negatively affect the fitness of the individual expressing it?gametophyteequally likely in both sporophyte and gametophytehighly improbable in both generationssporophyte Solution In which generation is a recessive deleterious allele MOST likely to negatively affect the fitness of the individual expressing it? Affects gametophytic generation as the gametes have single copy of the gene which leads to the expression of the existing gene. yes here is the explanation : You are aware that there are two phases in life cycle the gametophytic and the sporophytic generations. The gametophyte has haploid number or n number of chromosomes which means only half of the number in contrast to the sporophyte. sporophyte is diploid which means it has two sets of chromosomes represented by 2n. Of these two sets one comes from maternal and other from paternal which again means that chromosomes are paired or homologus. Then coming to the question it says the allele is recessive which means can express only in absence of a dominant counterpart and should be in double dose if it is sporophyte.if it is present in heterozygous condition the allele cannot express itself. since the gametophyte has n number of chromosomes if the deleterious allele is expressed it will affect the fitness of the population..

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Please answer all questions Define 1. Wild type – 2. Epistasis – Fill in the Blank 3. Two genes may interact effecting one trait and resulting in novel phenotypes with an F2 phenotypic ________________ ratio. 4. Under ________________ conditions, conditionally lethal mutants will die. True or False 5. Penetrance is the degree or intensity with which a particular genotype is expressed in a phenotype. 6. Continuous traits are usually controlled by multiple genes and may be influenced by the environment. Short Answer 7. Describe the inheritance pattern(s) of blood types. 8. When studying a newly discovered flowering plant in Costa Rica, you collect data on its petal color in an effort to determine how this trait may be inherited. You find that 852 flowers are red, 331 are white and 389 are yellow. What are the possible inheritance patterns, and how could you definitely conclude which of these possibilities is the true mode of inheritance? Solution Wild type- wild type phenotype refers to characteristics that occurs naturally in a breeding population. Epistasis - it refers to a phenomena when one gene’s expression is dependent on the presence of another gene(s), called the modifier gene. 9:16 Let\'s take an example of comb varieties in chicken We have two pure breeds : wyandotte whose phenotype is a rose comb and brahmas having the phenotype of a pea comb, when crossed with each other, they create a completely new phenotype of a walnut comb. Let\'s look at the ratio: Parental cross: rose comb x pea comb F1 : all walnut combs F2 : 9 walnut : 3 rose: 3peas : 1 single Hence the ratio is 9:16 Under the restrictive or nonpermissive condition conditions, conditionally lethal mutants will die. Conditionally lethal mutants are those which have an allele that will make the survival of the species difficult only in a specific condition. True. for example if a mutation in a gene gives the species a particular characterisitc which has 97%penetrance, only 97% of those with the mutation will develop that characteristic and 3 % will not. True. multiple genes affect continuous traits. For such complex gene interactions, the traits are influenced by environmental factors too. For example, height and skin color. There are four basic blood types which are A, B, AB and O and together with the Rh factor, these can be +ve or -ve. A and B are dominant, while O is recessive. Blood type A B O A A AB A B AB B B O A B O For Rh factor, Rh (+)ve is dominant. So if the any one or both parents have Rh (+)ve factor, the progeny will be Rh(+)ve. If both parents are Rh(-)ve, the progeny will be Rh (-)ve Father Mother D D d Dd Dd d Dd Dd 100% Rh (+)ve children Father Mother D d d Dd dd d Dd dd 50% Rh(+)ve children Red: 852 White: 331 Yellow:389 According to the given data, red is dominant and white is recessive and yellow is a result of incomplete dominance of both white and red phenotype. It can\'t be codominance, because codominance involves both phenotypes being expressed in di.

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Which of the following correctly matches a phase of the cell cycle with its description? View Available Hint(s) G 2 : cell division All of the listed responses are correctly matched. S: immediately precedes cell division M: duplication of DNA G 1 : follows cell division Part A How are sistor chromatis and homologous chromosomes different from each other? View Available Hint(s) Homologous chromosomes are identical coples of each ofher. One sister chromatid comes from the father, and one combs from the mother: Homologous chromosomes contain the same gene locl but may have difterent alleles of a particular gane. Sister chromsids are identical copibu of aach chher procuced during Drer reptcafion Homologous chromosores are closely assoeiated wath olch of th mitoois and miosis. Suter ctiromatids are only associaled with each onor during mibes. In a typical animal, mitosis produces while meiosis produces View Available Hint(s) four diploid daughter cells ... four haploid daughter cells two diploid daughter cells ... four haploid daughter cells two diploid daughter cells ... two diploid daughter cells two diploid daughter cells ... two haploid daughter cells four haploid daughter cells ... two diploid daughter cells Which of the following occurs during meiosis but not during mitosis? View Available Hint(s) Synapsis occurs. Chromosomes align at the metaphase plate. A spindle apparatus forms. Chromosomes migrate to opposite poles. Chromosomes condense. Which of the following is true of an X-linked gene but not of a Y-linked gene View Available Hint(s) It is expressed in half of the cells of either males or females. Sister chromatids separate during mitosis. The gene is present in both males and females. It does not segregate like other genes. It is only expressed in female offspring..

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describe the oceans solubility pump and the oceans biological pump using the pools of carbon (DIC, PIC, POC, DOC) and the processes. how are the two linked? where does the ocean \"take up\" C and where is it released from the ocean? Solution The oceans play an important role in regulating the amount of fever to in atmosphere because 02 can move quickly into and out of the oceans. It is estimated that approximately 93% of Co2is found in oceans. In oceans the solubility pump is physicochemical process which transports dissolved inorganic carbon to the interior. The solubility pump is driven by to principal factors. First one 4more C02 can dissolve into cold polar waters thane warm waters. As major ocean currents more from tropics to the poles they are cold and take more carbon dioxide from the atmosphere secondly the higher latitude zones also places where deep waters are formed as the water gets cold they become denser and sink into oceans interior absoring the Co2 accumulated on the surface. Bioloical pump: in this process carbon dioxide moves away from the surface ocean. Microscopic Marine animals called zooplankyon eat the phytoplankton and provide the basis for the food web for all animal life in the ocean. Although most of the fever to taken up by phytoplankton is recycled near the surface 30% sinks into the deeper waters before converted by Marine bacteria only 0.1 % reaches the sea floor as sediment. Carbon is cycled through the ocean biological processes of photosynthesis respiration and decomposition of aquatic plants. As the oceanic plants don\'t have large Woody stems the decomposition after quickly then on land Judo this very little carbon is stored in the ocean prove biological processes the total amount of carbonn update and carbon loss from the ocean depends on the balance of organic and inorganic processes. Carbon dioxide is soluble in water it reacts with water to form several ionic and nonionic compounds called dissolved inorganic carbon(DIC) for example aquous carbon dioxide ,carbonic acid, bicarbonate and carbonate. Carbon enters the ocean by dissolving in the water it also enters through rivers and other water bodies it is converted by organisms into organic carbon by photosynthesis and the food chain also helps in this process if circulates in the layout for longer periods before getting deposited as sediments. Oceanic absorption of Co2 is considered as very important form of carbon sequestration limiting the rate of carbon dioxide in the atmosphere. Dissolved organic carbon DOC in Marine systems is one of the cycled reservoir of organic matter on earth and it makes up 20% of all organic carbon in general these compounds are formed do the decomposition processes of organisms in the Marine system. It is defined as the organic matter that is able to pass through a filter range in size between 0.7 and 0.22 um. Particulate organic carbon POC is the carbon that is too large and is tilted out of your sample. Dissolved and parti.

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