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B)The same tropical fish can be thin or dumpy in shape. The dumpy phenotype is dominant. If a heterozygous blue, thin female mates with a red, heterozygous dumpy male, show the genotypes and phenotypic ratios of the offspring.

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Nelly Stracke
Nelly StrackeLv2
28 Sep 2019

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Related questions

You have a variety of gecko that is true breeding for the recessive traits of blue stripes (b) and fat tails (t). You take one of these geckos and cross it with the wild-type variety that is true breeding for the dominant traits of black stripes (B) and thin tails (T). One of the resulting heterozygous F1s is crossed with a blue-striped, fat tailed gecko, yielding the following progeny:


199 with blue stripes and fat tails
51 with blue stripes and thin tails
49 with black stripes and fat tails
201 with black stripes and thin tails

known: the allelic configuration in the heterozygous F1 is BT/bt

The genes controlling stripe color and tail width (in cM): 20cM

blue stripes and thin tails is genotype bbT_

Answer : If you intercross the heterozygous F1s, what is the probability that the offspring will have blue stripes and thin tails? ??

6.

When a parent who is heterozgyous for a trait is crossed with a parent who is heterozygous for a trait, the offspring will:

(remember homozygous means two of the same alleles and heterozygous means two different alleles)

Select one:

a. have 3 out of 4 the dominant phenotype and 1 out of 4 the recessive phenotype

b. have 2 out of 4 the dominant phenotype and 2 out of 4 the recessive phenotype

c. all have the dominant phenotype

d. have 1 out of 4 the dominant phenotype

7.

When a parent who is heterozgyous for a trait is crossed with a parent who is homozygous dominant for a trait, the offspring will:

(remember homozygous means two of the same alleles and heterozygous means two different alleles)

Select one:

a. all have the recessive phenotype

b. all will have the dominant allele

c. all be homozygous dominant genotype

8.

When a parent who is heterozgyous for a trait is crossed with a parent who is heterozygous for a trait, the offspring will:

(remember homozygous means two of the same alleles and heterozygous means two different alleles)

Select one:

a. have 3 dominant phenotypes, 2 heterozygous genotypes, and 1 homozygous recessive genotype

b. have 1 dominant phenotype, 2 heterozygous genotypes, and 1 homozygous recessive phenotype

c. have all dominant phenotypes, 2 heterozygous genotypes, and 1 homozygous recessive genotype

9.

When doing Punnett squares for fur, the letter f represents ______ and the letter F represents _____.

Select one:

a. the recessive allele, the dominant allele

b. the dominant allele, the recessive allele

c. the dominant gene, the recessive gene

d. the recessive gene, the dominant gene

10.

When a parent who is heterozgyous for a trait is crossed with a parent who is homozygous recessive for a trait, the offspring will:

(remember homozygous means two of the same alleles and heterozygous means two different alleles)

Select one:

a. be half heterozygous and half homozygous recessive

b. be all heterozygous

c. be all homozygous recessive

d. be all homozygous dominant

Red eye in a fruit fly is sex-linked and dominant to white eye color. Specify the distribution of eye color (a) among the males and (b) among the females, derived from the following crosses:

A. White-eyed female x red-eyed male

B. Heterozygous red-eyed female x white-eyed male

C. Heterozygous red-eyed female x red-eyed male

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