Question

1. Answer the following.

a) If a cell was 2n and underwent mitosis, what would be the ploidy level of the daughter cells?

b) If a cell 1n and underwent mitosis, what would be the ploidy level of the daughter cells?

c) What is the minimum ploidy level a cell must be to undergo meiosis? Explain.

d) The genome of the plant species Arabidopsis is n=7 and Arbidopsis is a diploid organism.

i) What is the ploidy level of the somatic cell of an Arabidopsis?

ii) How many chromosomes would these cells contain?

iii) What is the ploidy level of the spores and gametes of Arabidopsis?

iv) How many chromosome would each gamete contain?

e) The genome of the human species, Homo sapiens is n=23 and humans are diploid organisms.

i) What is the ploidy level of the somatic cell of an Arabidopsis?

ii) How many chromosomes would these cells contain?

iii) What is the ploidy level of the gametes of a human?

iv) How many chromosomes would each gamete contain?

Answer 1

A )Mitosis is called equational division,one cell divided in to two cells ,daughter cells also have same chromasome   number of parent cell cell.

The daughter cells ploidy will be also diploid      2n=2n+2n

B)Haploid cells also undergoes mitosis ,the ploidy of resultant cells will be also same.

       1n=1n+1n

C) The minimum ploidy level should be diploid.Haploid cells have only one copy of any of their chromosomes. a haploid cell copying it's DNA would result in a daughter cell with identical genome inhibiting genetic variation between haploid cells.

D)