Question

What would be the number of chromosomes in
aleurone layer of a self pollinated maize plant if
megaspore mother cell has 20 chromosomes?
10
20
30
40​

Answer 1

ANSWER:-

the answer would be 30

Answer 2

Number of Chromosomes

Explanation:

• Now if we talk about the ploidy of the megaspore mother cell, it is diploid (2n) as we know it is the cell in the plant where meiosis takes place to give 4 haploid cells.
• Thus if the megaspore mother cell has 20 chromosomes then, it means that 2n = 20
• From here we conclude that n = 10
• In addition to this, the ploidy of the aleurone layer is 3n (triploid) as it is the result of double fertilization, this signifies that we calculate chromosomes number as, 3 × 10 = 30 chromosomes.
• Thus the correct answer is 30 (option 3)