1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
sdas [7]
3 years ago
15

When true-breeding mice with brown fur and short tails (BBtt) were crossed to truebreeding mice with white fur and long tails (b

bTT), all F1 offspring had brown fur and long tails. The F1 offspring were crossed to mice with white fur and short tails. What are the possible phenotypes of the F2 offspring?
Biology
2 answers:
Nina [5.8K]3 years ago
7 0

Answer:

Brown fur, long tail (1)

Brown fur, short tail (1)

White fur, long tail (1)

White fur, short tail (1)

Explanation:

This is a cross involving two genes, one coding for fur colour and the other for tail length in mice. B and b are alleles for brown and white fur respectively while T and t are alleles for long and short tails respectively. According to the first cross in the question where a brown short-tailed mice (BBtt) was crossed with a white long-tailed mouse (bbTT) to produce a brown long offspring (BbTt), it shows that the brown fur allele (B) and Long tail allele are dominant over the white fur allele and short tail allele respectively. Since, their expression is masked.

Hence the F1 offsprings genotype is BbTt. When BbTt are crossed with a white fur and short-tailed mouse (bbtt), each parent produces the following gamete:

BbTt: BT, Bt, bT and bt

bbtt: bt, bt, bt, bt

Combining these gametes in a punnet square will produce 16 possible offsprings with only four different genotypes in the ratio 1:1:1:1.

The four genotypes with their Phenotypes are:

BbTt: brown fur, long tail (4)

Bbtt: brown fur, short tail (4)

bbTt: white fur, long tail (4)

bbtt: white fur, short tail (4)

mixer [17]3 years ago
7 0

Answer:

F2 phenotypes: brown fur, short tails; brown fur, long tails; white fur, short tails; and white fur, long tails.

You might be interested in
In what year did Oxford scientist Robert Brown discover the motion of small particles?
photoshop1234 [79]
1827 is when Oxford discovers the small particles
6 0
1 year ago
Which event occurs FIRST in an astronaut’s day?
eimsori [14]
The first event or first thing they do, because the first thing they do is exercise for 2 hours everyday to keep their muscle and bone strength.
4 0
3 years ago
Read 2 more answers
The members of these kindoms all have cell walls. Which kingdoms are they?
Kazeer [188]

Answer:

Plantae, Archaebacteria, Eubacteria, and potentially fungi. I say potentially because I am not 100% certain if all organisms falling under the category of fungi contain cell walls.

7 0
3 years ago
Which of the following does not describe hormones in the body? I’ll mark the correct answer a brainliest
myrzilka [38]

I think its C. hormones act on muscles and glands only. Because hormones act on cells, tissues, organs etc. So this is incorrect and the rest of them are correct.

5 0
2 years ago
Plz help asap!!! i’ll give brainlest!
photoshop1234 [79]
The answer is carbohydrate
4 0
2 years ago
Read 2 more answers
Other questions:
  • Need help with biology homework!​
    11·1 answer
  • Hi I need some help on these two questions
    9·1 answer
  • Imagine a dihybrid cross. if there are 80 progeny (we are talking about snails here), approximately how many snails would you ex
    14·1 answer
  • 1. List the distances between each pair of genes:
    6·1 answer
  • Please, please help!
    8·1 answer
  • Can anyone please tell me the answer to these? I’m left clueless. 30 points!
    5·1 answer
  • Which of the following causes a tumor to form?
    8·1 answer
  • TIME REMAINING
    7·2 answers
  • what structure is less likely to suffer severe damage during an earthquake a high-rise steel frame Hotel built on segments or a
    5·1 answer
  • PLSSSSSSS HELPPPPPPP I WILL GIVE BRAINLIESTTTTTTTTTT!!!!!!!!!!!!!!!!!!!!!PLSSSSSSS HELPPPPPPP I WILL GIVE BRAINLIESTTTTTTTTTT!!!
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!