Question

In: Biology

1. In cats, long hair (s) is recessive to short hair (S). a) A true-breeding (homozygous)...

1. In cats, long hair (s) is recessive to short hair (S).
a) A true-breeding (homozygous) shorthaired male is mated to a longhaired female. What will their kittens look like? Explain your answer. Show your Punnett square.
b) A longhaired female cat mates with a stray male cat. The resulting litter contains two shorthaired and three longhaired kittens. What was the male’s phenotype and genotype? Explain your answer. Show your Punnett square.

Solutions

Expert Solution

1.Here short hair is dominant to long hair. So the allele for short here will supress the charecter of the long hair. If there is one allele for short hair , the phenotype will be short hair. Two coppy of the long haire allele must be need to produce long hair offspring.

2. Here there are two cats . We know the genotype of one but not the others. So to identify the genotype of the unknown cat we must do a test cross. Test cross is performed with a homozygous recessive known genotype with the unknown genotype. Here the female with long haired is to be crossed with a stray cat. Hence it is a test cross.


Related Solutions

) In muskrats, short hair is recessive to long hair and brown coat is recessive to...
) In muskrats, short hair is recessive to long hair and brown coat is recessive to black coat. (Both are autosomal.) You cross a true-breeding short-haired black muskrat to a true-breeding long-haired brown muskrat. Let L= long and l= short, and let B= black and b= brown . A) Diagram this cross, showing the genotypes of the parents and the F1. B) Now you test cross the F1. Diagram this test cross, showing the genotypes of the F2 produced. C)...
In Cats, Short Hair (H) is dominant to , Long hair (h). Tabby (T) is dominant...
In Cats, Short Hair (H) is dominant to , Long hair (h). Tabby (T) is dominant to , Stripless (t). Normal, no colorpoint (N) is dominant to, Colorpoint (n). I. A homozygous short hair, homozygous stripeless cat and a homozygous long hair, homozygous tabby cat have kittens. a. Draw the Punnett Square (4x4 square). b. What is the phenotype ratio?____________________________ c. What percentage of the offspring will have short hair and be stripeless? _____________ II. A heterozygous tabby, heterozygous normal...
A true breeding red eyed fly with long bristles was crossed to a true breeding white...
A true breeding red eyed fly with long bristles was crossed to a true breeding white eyed fly with stubble bristles. All F1 progeny are red eyed with stubble bristles. An F1 female is crossed to a tester male and the following numbers of progeny are observed: 56 red eyed, stubble bristles; 72 red eyed, long bristles; 61 white eyed stubble bristles; and 68 white eyed, long bristles. You are asked to perform a chi-squared test for this result. 1....
Practice Problems for Bio 1: 1) Short hair is dominant over long hair in dogs. If...
Practice Problems for Bio 1: 1) Short hair is dominant over long hair in dogs. If a short-haired dog whose mother was long-haired is crossed with a long-haired dog, what proportion of the offspring will be short-haired? 2) The common grackle is a species of robin-sized blackbirds that are fairly common over most of the United States. Suppose that long tails (L) were dominant to short tails in these birds. A female short-tailed grackle mates with a male long-tailed grackle...
18. Short hair in rabbits is governed by a dominant gene (L) and long hair by...
18. Short hair in rabbits is governed by a dominant gene (L) and long hair by a recessive allele (l). Black hair results form the action of the dominant genotype (B_) and brown from the recessive genotype (bb). In a cross between homozygous short, black haired rabbit and a homozygous long, brown haired rabbit what are the phenotypic and genotypic ratios of the F1 and F2 generation.
1- When crossing two organisms for a single trait - one that is homozygous recessive with...
1- When crossing two organisms for a single trait - one that is homozygous recessive with one that is homozygous dominant - what is the chance of producing an offspring with the homozygous recessive phenotype? Group of answer choices )% 75% 25% 100% 2- Incomplete dominance is when? Group of answer choices Homozygotes show an intermediate phenotype There is no homozygous genotype Heterozygotes show an intermediate phenotype Heterozygotes share dominance 3- When antibodies in the plasma attach to antigens on...
1. You cross a true-breeding parental with yellow flowers and oval petals with a true-breeding parental...
1. You cross a true-breeding parental with yellow flowers and oval petals with a true-breeding parental with purple flowers and round petals. The F1 offspring have purple flowers and oval petals. a. Give the genotypes for the parentals and F1s (you can choose your own letters for the alleles): yellow flower oval petal parental: _____ purple flower round petal parental: _____ purple flower oval petal F1: _______ b. You perform a cross of the F1s, to produce the F2 generation....
Monohybrid Problems Among rabbits, short hair is dominant over long hair. What would be the appearance...
Monohybrid Problems Among rabbits, short hair is dominant over long hair. What would be the appearance of the rabbits if a heterozygous short hair female were mated with a homozygous short hair male? Dominant allele: ____ Recessive allele: ____ Genotypes of offspring: ___________________ Genotypes of parents: _________ Phenotypes of parents: _________ Phenotypes of offspring: ___________________ Among roses, red color is dominant over white color. What would be the appearance of the roses from a cross between a homozygous red rose...
4.In dancing bears, short fur is dominant to long fur, and curly hair is dominant to...
4.In dancing bears, short fur is dominant to long fur, and curly hair is dominant to straight. The genes for these traits are located on separate autosomes. You have a large population of dancing bears with the following allele frequencies Short fur (S) p = 0.5, Long fur (s) q = 0.5 Curly hair (C) p = 0.3, Straight hair (c) q = 0.7 You allow the population to randomly breed for several generations. You have a population of 1000...
Consider an individual that is homozygous for the short allele of the 5-HTT gene. 1) If...
Consider an individual that is homozygous for the short allele of the 5-HTT gene. 1) If this individual is exposed to relatively few stressful life events, how would you expect the probability of major depression to compare an individual that is homozygous for the long allele? 2) If this individual is exposed to many stressful life events, how would you expect the probability of major depression to compare an individual that is homozygous for the long allele?
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT