Homework Answers
Ans 2: It is given that black coat (B) is dominant to tan coat (b) and short tails (t) are dominant to long tails (t) so-
|
Phenotype |
Genotype |
Number of Offspring |
|
Black coat, short tail |
B_T_ (Parental) |
18 |
|
Black coat, long tail |
B_tt |
3 |
|
Tan coat, long tail |
bbtt (Parental) |
15 |
|
Tan coat, short tail |
bbT_ |
1 |
Percent recombination or recombinant frequency= (No. of recombinants/ Total number of offsprings)*100= 4/37*100 ~ 11%.
Ans 3: As it is given in the question that corgi is heterozygous for both traits and second parent is recessive homozygous because of the test cross, so gametes produced by these parental genotypes are:
BT, Bt, bT, bt (from heterozygous parent) and bt (from recessive homozygous parent).
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need help with 2-3
2. In corgis, black coat (B) is dominant to tan coat (b)...
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1. Corgi coats exist in two different colors: tan and black. Imagine that the alleles for the tan coat are dominant to the alleles for the black coat. Draw a Punnett square resulting from a cross between two heterozygous tan corgis. a. Label the gametes from each parent with the probability of passing each allele b. What is the probability that a corgi will have a recessive genotype from the two parents? 2. If a corgi...
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As it is
UNIT GENETICS PROBLEMS #2: TEST CROSSES 1. In peas, green pods are dominant and yellow pods are the recessive trait. You have pea plants with green pods but you are unsure of the parentage of these plants. How would you determine the genotype of your green pod plants 2. Two black mice mate. Six of their offspring are black and two are white. (Black fur is dominant to white.) a· What are the genotypes of the parents....
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In mice, black fur (B) is dominant over brown fur (b). Breeding a brown mouse and a homozygous black mouse produces all black offspring. a. What is the genotype of the gametes produced by the brown-furred parent? ________________________________________________________ b. What is the genotype of the brown-furred parent? ________________________________________________________ c. What is the genotype of the black furred parent? ________________________________________________________ d. What is the genotype of the black-furred offspring? By convention, P stands for the parental generation. The offspring are called...
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need help with 1-3
1. Corgi coats exist in two different colors: tan and black. Imagine that the alleles for the tan coat are dominant to the alleles for the black coat. Draw a Punnett square resulting from a cross between two heterozygous tan corgis. a. Label the gametes from each parent with the probability of passing each allele b. What is the probability that a corgi will have a recessive genotype from the two parents? 2. If a corgi...
4. In horses, black coat is dominant to brown coat, and trotter to pacer. A black trotter mare has a brown pacer offspring. What is the genotype of the offspring? Genotype of the Mare (female parent)? Genotype of the Stallion (male parent)? Phenotype of stallion? If the stallion could have more than one genotype and phenotype, show how. Step 1: B - black coat; b = brown coat; T = trotter; t-pacer black trotter female x? Step 2: Steps 3...
As it is
UNIT GENETICS PROBLEMS #2: TEST CROSSES 1. In peas, green pods are dominant and yellow pods are the recessive trait. You have pea plants with green pods but you are unsure of the parentage of these plants. How would you determine the genotype of your green pod plants 2. Two black mice mate. Six of their offspring are black and two are white. (Black fur is dominant to white.) a· What are the genotypes of the parents....
11. You are a researcher studying mice. You hypothesize allele, brown coat; B-dominant allele, black coat) and tail length (I recessive allele, shor allele, long tail) in mice are independently assorted. You know that both genes are autosomai gen. Youhve that genes that control coat color (b - recessive tail, L-dominant colonies of true- Obreeding access to two with short tails and brown coats. You cross the females and males described above and then you cross the F1s. Your aggregated...
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coat color is due to a dominant allele (W), black coat color to its recessive allele unnett squares for each of the following crosses and answer the questions. 2. In sheep, white tw). Construct P d frequency fo a. A black sheep crossed to a black sheep. List the genotypes, phenotypes, an each of the offspring b. A white sheep, the product of a black x white cross, is crossed with a black sheep. List the genotypes, phenotypes, and frequency...
In dogs, short hair is dominant over long hair, and dark coat
color is dominant over albino fur. Assuming that these effects are
caused by two independently sorting genes, what will be the result
of the following cross? Create a Punnet square and show your
work.
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