Identify the stage of mitosis where the sister chromatids separate and each daughter cell gets one chromosome.
2 answers:
Answer:
The correct answer would be C) anaphase.
Anaphase is the stage of mitosis in which sister chromatids of chromosomes are separated and are distributed equally in two daughter cells.
The protein glue or cohesins that bind the sister chromatids are broken which release the two identical chromosomes.
Mitotic spindle present at either end of the cell pull apart the identical chromosomes in opposite directions.
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Answer:
D. 1 BB : 2 Bb : 1 bb
Explanation:
This question involves a single gene coding for fur color in guinea pig. Black fur (B) is dominant over white fur (b). This means that, as stated in the question, if a black fur parent (BB) is crossed with a white fur parent (bb), a 100% heterozygous offspring (Bb) with black fur will result.
If two heterozygous guinea pigs are crossed i.e. Bb × Bb, the following gametes will be produced by each heterozygous parent:
Bb = B and b
Using these gametes in a punnet square (see attached image), offsprings with the following genotypic ratio will be produced:
1 BB : 2 Bb : 1 bb
BB and Bb = black fur guinea pigs
bb = white fur guinea pigs
