4B - Diversity and Selection

Question 1

What is a diploid number of chromosomes

Answer 1

Each cell contains 2 of each chromosome, one from each parent.

Question 2

What is a haploid number of chromosomes

Answer 2

Each cell contains only 1 of each chromosome

Question 3

What are pair of matching chromosomes called

Answer 3

homologous chromosomes

Question 4

What number of chromosomes do gametes have

Answer 4

haploid

Question 5

Stages of meiosis

Answer 5

1. DNA unravels and replicated to form chromatids
2. DNA condenses and forms double armed chromosomes made from SISTER CHROMATIDS joined by a CENTROMERE.
3. First division - Chromosomes arrange into homologous pairs which are separated
4. Second division - Centromere is divided which splits the sister chromatids
5. Four haploid cells are produced