Homework Answers
7.
Female Calico cat genotype is XB Xb
Male black cat genotype is XB Y or Xb Y
The gametes from Female Calico cat are XB and Xb
The gemetes from hemizygous male Black cat are XB or Xb and Y.
Cross between female Calico cat and male black cat will result in XB XB or XBXb, XbXB and XbXb and XBY and XbY
XB XB - female black cat
XBXb - female Calico cat
XbXb - female brown cat
XBY - male Black cat
XbY - male brown cat
8.
Deafness gene is recessive , "d". This is present on X
chromosome.
The genotype of Female cat which is heterozygous for deafness is
XDXd
The genotype of male cat which is not deaf is XDY
The cross between them gives the offspring with the following
genotypes: XDXD, XdXD, XDY and XdY.
25 % - female cat which is not deaf,
25 % - female cat which is heterozygous for deafness or
heterozygous Normal
25 % - male cat which is hemizygous normal
25 % - male cat which is hemizygous deaf
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7. A female calico cat is crossed with a male black cat. What are the phenotypes...
10. A green-leafed fuzzywhatsit (I made this plant up) is crossed with a fuzzywhatsit with yellow-striped...
10. A green-leafed fuzzywhatsit (I made this plant up) is crossed with a fuzzywhatsit with yellow-striped leaves. The cross produces 185 green-leafed fuzzywhatsits. What were the genotypes of both parents? • Summarize the genotypes & phenotypes of the offspring that would be produced by crossing two of the green-leafed fuzzywhatsits obtained from the initial cross. 11. In dogs, there is a hereditary deafness caused by a recessive gene, "d." A kennel owner has a male dog that she wants to...
(Problem 66a) Male house cats are either black or orange; females are black, orange, or calico....
(Problem 66a) Male house cats are either black or orange; females are black, orange, or calico. If these coat-color phenotypes are governed by a sex-linked gene, how can these observations be explained? A.The gene is on the X chromosome and three alleles must be involved. B.Calico males die before birth C.In males, orange is always dominant over calico. D. The gene is on the X chromosome and heterozygous females display the calico phenotype. . E.Calico males are sterile. (Problem 66...
5. Show the cross of a red eyed female (heterozygous) and a red eyed male What...
5. Show the cross of a red eyed female (heterozygous) and a red eyed male What are the genotypes of the parents? How many of the offspring are white eyed, male white eyed, female red eyed, male red eyed, female 6. In humans, hemophilia is a sex linked trait. Females can be normal, carriers, or have the disease. Males will either have the disease or not (but theywon'tever be carriers) XHXH=female, non-hemophilic X H X h female, carrier Xh Xh-...
17. In cats, yellow fur is dominant to black fur. The heterozygous tortoise-shell" or "calico" condition...
17. In cats, yellow fur is dominant to black fur. The heterozygous tortoise-shell" or "calico" condition is exhibited only by the female. The fur trait is sex-linked. What offspring (genotypes, phenotypes and frequencies) would you expect from the cross of a black male with a yellow female? What kinds of offspring would you expect to result from the cross of a black male with a tortoise-shell female? How about the cross of two tortoise-shell animals?! dong
3. In cats, the B allele codes for black fur, and the b allele codes for...
3. In cats, the B allele codes for black fur, and the b allele codes for orange fur. The gene is located on the X chromosome. However, the genotype XB/Xb results in fur with a mottled appearance called tortoise-shell. Suppose a tortoise-shell female is crossed with a black male. a. What are the parental genotypes? b. What phenotypic ratios would be expected in the offspring? c. What is the mode of inheritance? d. A rich client wants a tortoise-shell male....
Question 3 20 pts Genetically, why does a Calico cat have the orange and black patterned...
Question 3 20 pts Genetically, why does a Calico cat have the orange and black patterned patches of fur? The fur pattern is due to activation of a homozygous autosomal chromosome. The fur pattern is due to activation of a heterozygous sex linked chromosome. The fur pattern is due to activation of a homozygous sex linked chromosome. The fur pattern is due to inactivation of a heterozygous sex linked chromosome The fur pattern is due to inactivation of a homozygous...
2. A white eyed female fly (w is a recessive allele of a gene for eye...
2. A white eyed female fly (w is a recessive allele of a gene for eye pigmentation on the X chromosome) is crossed with a red eyed male fly. a. Give the genotypes for the parental generation. b. Give the phenotypes and genotypes, and their proportions, for the F1 generation. c.Fls are crossed to one another. Give the phenotypes and genotypes, and their proportions, for the F2 generation.
2o poihe Some cats have hairs in which there is more than one hair distributed along...
2o poihe Some cats have hairs in which there is more than one hair distributed along the hair shaft. This is known agouti. The agouti hairs are produced by protein which is coded for by the agouti gene. a. The agouti gene has two allles. The dominantallele codes for agouti hairs and the recessive allele codes for non-agouti hairs. State the phenotypes that are possible and the probability of having an offspring with each phenotype for a cross between a...
1. You just bought two black guinea pigs, one male and one female, of the same...
1. You just bought two black guinea pigs, one male and one female, of the same genotype from the pet store that are known to be heterozygous (Bb). You also know that black fur (BB) is dominant over white fur (bb) and that a lethal recessive allele is located only one cM away from the recessive b allele, and your animals are both heterozygous for this gene also. What is the probability of finding a white individual among the progeny...
that's all the professor give 3. In pigs, black hair (B) is dominant to red hair...
that's all the professor give
3. In pigs, black hair (B) is dominant to red hair (b). Erect ears (E) are dominant to drooping ears (e). What are the expected proportions of the different phenotypes resulting from a mating between two pigs heterozygous for both traits? SHOW A PUNNETT SQUARE 4. There are 2 colors in color squash, white & yellow. White (W) is dominant over yellow (w). What are the expected genotype and phenotype frequencies for each of the...
10. A green-leafed fuzzywhatsit (I made this plant up) is crossed with a fuzzywhatsit with yellow-striped leaves. The cross produces 185 green-leafed fuzzywhatsits. What were the genotypes of both parents? • Summarize the genotypes & phenotypes of the offspring that would be produced by crossing two of the green-leafed fuzzywhatsits obtained from the initial cross. 11. In dogs, there is a hereditary deafness caused by a recessive gene, "d." A kennel owner has a male dog that she wants to...
5. Show the cross of a red eyed female (heterozygous) and a red eyed male What are the genotypes of the parents? How many of the offspring are white eyed, male white eyed, female red eyed, male red eyed, female 6. In humans, hemophilia is a sex linked trait. Females can be normal, carriers, or have the disease. Males will either have the disease or not (but theywon'tever be carriers) XHXH=female, non-hemophilic X H X h female, carrier Xh Xh-...
17. In cats, yellow fur is dominant to black fur. The heterozygous tortoise-shell" or "calico" condition is exhibited only by the female. The fur trait is sex-linked. What offspring (genotypes, phenotypes and frequencies) would you expect from the cross of a black male with a yellow female? What kinds of offspring would you expect to result from the cross of a black male with a tortoise-shell female? How about the cross of two tortoise-shell animals?! dong
Question 3 20 pts Genetically, why does a Calico cat have the orange and black patterned patches of fur? The fur pattern is due to activation of a homozygous autosomal chromosome. The fur pattern is due to activation of a heterozygous sex linked chromosome. The fur pattern is due to activation of a homozygous sex linked chromosome. The fur pattern is due to inactivation of a heterozygous sex linked chromosome The fur pattern is due to inactivation of a homozygous...
2. A white eyed female fly (w is a recessive allele of a gene for eye pigmentation on the X chromosome) is crossed with a red eyed male fly. a. Give the genotypes for the parental generation. b. Give the phenotypes and genotypes, and their proportions, for the F1 generation. c.Fls are crossed to one another. Give the phenotypes and genotypes, and their proportions, for the F2 generation.
2o poihe Some cats have hairs in which there is more than one hair distributed along the hair shaft. This is known agouti. The agouti hairs are produced by protein which is coded for by the agouti gene. a. The agouti gene has two allles. The dominantallele codes for agouti hairs and the recessive allele codes for non-agouti hairs. State the phenotypes that are possible and the probability of having an offspring with each phenotype for a cross between a...
1. You just bought two black guinea pigs, one male and one female, of the same genotype from the pet store that are known to be heterozygous (Bb). You also know that black fur (BB) is dominant over white fur (bb) and that a lethal recessive allele is located only one cM away from the recessive b allele, and your animals are both heterozygous for this gene also. What is the probability of finding a white individual among the progeny...
that's all the professor give
3. In pigs, black hair (B) is dominant to red hair (b). Erect ears (E) are dominant to drooping ears (e). What are the expected proportions of the different phenotypes resulting from a mating between two pigs heterozygous for both traits? SHOW A PUNNETT SQUARE 4. There are 2 colors in color squash, white & yellow. White (W) is dominant over yellow (w). What are the expected genotype and phenotype frequencies for each of the...
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