Question

PROBLEM 2. PHASES OF MITOSIS. Widely distributed in North America where it is of great ecological and economic significance, the migratory grasshopper Melanoplus sanguinipes is a common inhabitant of grasslands and meadows. In the migratory grasshopper, 2n = 24. For each stage listed below, indicate the number of chromosomes that would be observed in a germ cell lie, a cell fated to give rise to gametes in a sexually reproducing organism) of a migratory grasshopper. Enter each response as a whole number in Arabic numbers without spaces or punctuation; e.g., if your answer is eleven, enter: 1

1) G1.

2)S Phase.

3)Prophase I.

4)Late Anaphase I.

5)Metaphase II.

Answer 1

Ans) Grasshopper has 2n=24 chromosomes which means n=12 which means grasshopper got one pair of 12 chromosomes from father and another pair of 12 chromosomes from mother.

1) G1 phase = 24 chromosomes

2) S phase = 24 chromosomes

3) Prophase-I = 24 chromosomes

4) Late Anaphase-I = 24 chromosomes

5) Metaphase-II = 12 chromosomes