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).
24 In cats the allele for short hair is dominant H to the.pdf
1. 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)
