Question

What are the expected F1 and F2 [F1 siblings are mated] generations for the following crosses....

What are the expected F1 and F2 [F1 siblings are mated] generations for the following crosses. Provide phenotypic and genotypic ratios for both the F1 and F2 offspring.

a) Parents: EEBB (Black) × EEbb (chocolate)

b) Parents: eeBB (Yellow) × EEbb (chocolate)

Science   Biology   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

A. F1 offspring

Eb Eb
EB EEBb EEBb
EB EEBb EEBb

All the F1 offspring are black and the genotype is EEBb

F2 offspring EEBb x EEBb

EB Eb
EB EEBB EEBb
Eb EEBb EEbb

Genotypic ratio of F2 offspring is 3:1

Phenotypic ratio is black ( 1 EEBb and 2 EEBb) and chocolate ( 1 EEbb)

B. F1 offspring

Eb Eb
eB EeBb EeBb
eB EeBb EeBb

All the F1 offspring are black and the genotype is EeBb

F2 offspring

EB Eb eB eb
EB EEBB EEBb EeBB EeBb
Eb EEBb EEbb EeBb Eebb
eB EeBB EeBb eeBB eeBb
eb EeBb Eebb eeBb eebb

The genotypic ratio is 9:3:3:1

The phenotypes are 9 black ( 1 EEBB, 2 EEBb, 2 EeBB, 4 EeBb)

3 chocolate ( 1 EEbb, 2 Eebb)

3 yellow ( 1 eeBB, 2 eeBb)

1 unknown color ( 1 eebb)

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A yellow Labrador is mated with a black Labrador - both parents' genotypes are unknown. The...
A yellow Labrador is mated with a black Labrador - both parents' genotypes are unknown. The puppies when born are half yellow [4/8], 3/8 black, and 1/8 chocolate. What are the genotypes of the two parents?
In summer squash, white fruits (W) are dominant to yellow fruits (w) while flat fruits (F)...
In summer squash, white fruits (W) are dominant to yellow fruits (w) while flat fruits (F) are dominant to rounded fruits (f). The selected parents are a white, flat fruit (WWFF) and a plant with yellow and rounded fruits. A) For the F1 generation, what would the phenotypic and genotypic ratios? B) For the F2 generation, what would the phenotypic ratio?
Plump chicken body size (P) is dominant to skinny chicken body size (p). Aggressive behavior (A)...
Plump chicken body size (P) is dominant to skinny chicken body size (p). Aggressive behavior (A) is dominant to docile behavior (a). A male rooster is mated with a female chicken, and both parents are heterozygous for both traits (i.e. both are dihybrid). What are expected genotypic and phenotypic ratios among their offspring?
If an F2 generation from a self-crossed F1 generation always yields offspring in a 3:1 phenotypic...
If an F2 generation from a self-crossed F1 generation always yields offspring in a 3:1 phenotypic ratio, which of the following P crosses could have occurred? a. Aa x AA b. AA x AA c. aa x Aa d. aa x aa e. AA x aa
Pigment in mouse fur is only produced when the C allele is present. Individuals of the...
Pigment in mouse fur is only produced when the C allele is present. Individuals of the cc genotype are white. If color is present, it may be determined by the A, a alleles. AA or Aa results in agouti color, while aa results in black coats. a. What F1 and F2 genotypic and phenotypic ratios are obtained from a cross between AACC and aacc mice? b. In two testcrosses between agouti females, whose genotypes were unknown, and males of the...
3. In crosses between guinea pigs of a certain variety, offspring have either brown or yellow...
3. In crosses between guinea pigs of a certain variety, offspring have either brown or yellow hair, which is either long or short. Assume that the traits are each single gene traits. Consider the following crosses and the resultant F1 progeny: Cross 1 P: female with long, brown hair X male with long, brown hair F1: long, brown short, yellow long, yellow short, brown Cross 2 P: female with long, brown hair X male with short, yellow hair F1: long,...
. A geneticist crosses a pure-breeding strain of peas producing yellow, wrinkled seeds with one that...
. A geneticist crosses a pure-breeding strain of peas producing yellow, wrinkled seeds with one that is pure-breeding for green, round seeds. (Remember that yellow and round are the dominant alleles). a. Use a Punnett square to predict the F2 progeny that would be expected if the F1 are allowed to self-fertilize. b. What proportion of the F2 progeny are expected to have yellow seeds? Wrinkled seeds? Green seeds? Round seeds? c. What is the expected phenotype distribution (ratio) among...
In guinea pigs, black coat (B) is dominant over white (b). If a homozygous black animal...
In guinea pigs, black coat (B) is dominant over white (b). If a homozygous black animal is crossed with a white animal, what will be the appearance of their offspring? Give the genotypic and phenotypic ratios The phenotype ratio of the offspring is                       1:1 3:1                                                           1:2:1 4:0                                                                                                                                                   2. The genotype ratio of the offspring is _____________ 1:1 3:1 1:2:1 4:0 In summer squash, white fruit (W) is dominant over yellow fruit (w). 3. If a...
In mice, black hair "B" is dominant to brown hair "b", and smooth coat "S" is...
In mice, black hair "B" is dominant to brown hair "b", and smooth coat "S" is dominant to rough coat "s". Cross a brown, rough coated mouse, with a brown, homozygous smooth coated mouse. a. What are the genotypes of the parents? b. What is the expected genotypic ratio of the offspring? c. What is the expected phenotypic ratio of the offspring?
1) In cattle, there is no dominance between the alleles for red coat (W) and white...
1) In cattle, there is no dominance between the alleles for red coat (W) and white coat (c). The heterozygote is intermediate or "roan" in color. a) Give the genotypic and phenotypic ratios to be expected following a mating between two roan animals. b) What are the expected genotypic and phenotypic ratios from a cross between a roan animal and a white one? 2) In cattle, the hornless condition (H) is dominant to that for the possession of horns (h)....
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT