Question

3. If the female gamete of a plant species has four
chromosomes, then its parental cell had
(1) 16 chromosomes during anaphase-|
(2) 4 bivalents aligned on the equatorial plate
during metaphase-
(3) 16 tetrads during pachytene
(4) 16 chromosomes during G, stage​

Answer 1

Answer:

answe will be 1)16 chromosomes during anaphase-|

Answer 2

Answer:

The correct answer is 2) 4 bivalents aligned on the equatorial plate.

Explanation:

• The cell cycle consists of four phases:- Prophase, Metaphase, Anaphase, Telophase and a resting phase called Interphase.
• The prophase consists of condensation of the chromatin network into chromosomes.
• The chromosomes align on the equatorial plate during metaphase.
• The sister chromatids of a chromosome detach from the centrosome and move towards the opposite poles of the cell during anaphase.
• The nucleus undergoes division into two called karyokinesis during telophase, followed by cell division or cytokinesis.

• The number of chromosomes in an organism is 2n and the number of chromosomes in each gamete of an organism is n (i.e half that of the parent organism).

Thus, the correct answer is that female gamete of a plant containing four chromosomes has 4 bivalents aligned on the equatorial plate in the parental cell.