Question

If the number of dyads at each pole during Anaphase-I is 25 the gametes will contain how many chromosomes?

• A. 25
• B. 50
• C. 100
• D. None of above

Answer 1

The correct option is A 25

Answer is option A i.e. "25"
Anaphase-I begins when two chromosomes of bivalant tetrad separates and move to opposite poles of the cell due to spindle action. During anaphase-I sister chromatids remains attached at centromere and move together towards opposite end poles. This implies that a dyad represents one chromosome. Given, number of number of dyads at each pole is 25 in Anaphase-I, therefore, 1 dyad = 1 chromosome and hence 25 dyad = 25 chromosomes.