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In mice black coat colour (allele B) is dominant to brown coat colour (allele b). The offspring of a cross between a black mouse (BB) and brown mouse(bb) were allowed to interbreed. Wht percentage of progeny would have black coats? A.25% B.50% C.75% D.100%?
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In mice black coat colour (allele B) is dominant to brown coat colour ...
Solution:
Given, black coat colour (allele B) is dominant to brown coat colour (allele b).
Parental cross:
BB (black mouse) x bb (brown mouse)
Offsprings of F1 generation:
All the offspring will be heterozygous for the black coat colour (Bb).
F1 generation interbreeding:
The Punnett square for the F1 generation interbreeding is shown below:
| | B | b |
|---|---|---|
| B | BB | Bb |
| b | Bb | bb |
The possible genotypes and phenotypes of the offspring are:
- BB (black) - 1/4th or 25%
- Bb (black) - 2/4th or 50%
- bb (brown) - 1/4th or 25%
Therefore, 75% of the progeny would have black coats (BB or Bb), and 25% would have brown coats (bb).
Answer: Option C. 75%
Explanation:
The black coat colour is dominant to brown coat colour. Therefore, if an individual has at least one dominant allele (B), it will have a black coat. In the F1 generation, all the offspring will be heterozygous for the black coat colour (Bb) because one parent is homozygous dominant (BB) and the other parent is homozygous recessive (bb). When the F1 generation interbreeds, the possible genotypes and phenotypes of the offspring can be predicted using a Punnett square. The ratio of black to brown coat colour is 3:1. Therefore, 75% of the progeny would have black coats (BB or Bb), and 25% would have brown coats (bb).
Given, black coat colour (allele B) is dominant to brown coat colour (allele b).
Parental cross:
BB (black mouse) x bb (brown mouse)
Offsprings of F1 generation:
All the offspring will be heterozygous for the black coat colour (Bb).
F1 generation interbreeding:
The Punnett square for the F1 generation interbreeding is shown below:
| | B | b |
|---|---|---|
| B | BB | Bb |
| b | Bb | bb |
The possible genotypes and phenotypes of the offspring are:
- BB (black) - 1/4th or 25%
- Bb (black) - 2/4th or 50%
- bb (brown) - 1/4th or 25%
Therefore, 75% of the progeny would have black coats (BB or Bb), and 25% would have brown coats (bb).
Answer: Option C. 75%
Explanation:
The black coat colour is dominant to brown coat colour. Therefore, if an individual has at least one dominant allele (B), it will have a black coat. In the F1 generation, all the offspring will be heterozygous for the black coat colour (Bb) because one parent is homozygous dominant (BB) and the other parent is homozygous recessive (bb). When the F1 generation interbreeds, the possible genotypes and phenotypes of the offspring can be predicted using a Punnett square. The ratio of black to brown coat colour is 3:1. Therefore, 75% of the progeny would have black coats (BB or Bb), and 25% would have brown coats (bb).
Community Answer
In mice black coat colour (allele B) is dominant to brown coat colour ...
75 %
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In mice black coat colour (allele B) is dominant to brown coat colour (allele b). The offspring of a cross between a black mouse (BB) and brown mouse(bb) were allowed to interbreed. Wht percentage of progeny would have black coats? A.25% B.50% C.75% D.100%?
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In mice black coat colour (allele B) is dominant to brown coat colour (allele b). The offspring of a cross between a black mouse (BB) and brown mouse(bb) were allowed to interbreed. Wht percentage of progeny would have black coats? A.25% B.50% C.75% D.100%? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about In mice black coat colour (allele B) is dominant to brown coat colour (allele b). The offspring of a cross between a black mouse (BB) and brown mouse(bb) were allowed to interbreed. Wht percentage of progeny would have black coats? A.25% B.50% C.75% D.100%? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In mice black coat colour (allele B) is dominant to brown coat colour (allele b). The offspring of a cross between a black mouse (BB) and brown mouse(bb) were allowed to interbreed. Wht percentage of progeny would have black coats? A.25% B.50% C.75% D.100%?.
In mice black coat colour (allele B) is dominant to brown coat colour (allele b). The offspring of a cross between a black mouse (BB) and brown mouse(bb) were allowed to interbreed. Wht percentage of progeny would have black coats? A.25% B.50% C.75% D.100%? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about In mice black coat colour (allele B) is dominant to brown coat colour (allele b). The offspring of a cross between a black mouse (BB) and brown mouse(bb) were allowed to interbreed. Wht percentage of progeny would have black coats? A.25% B.50% C.75% D.100%? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In mice black coat colour (allele B) is dominant to brown coat colour (allele b). The offspring of a cross between a black mouse (BB) and brown mouse(bb) were allowed to interbreed. Wht percentage of progeny would have black coats? A.25% B.50% C.75% D.100%?.
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