Meiosis

Question 1

What is the difference between Diploid and Haploid?

Answer 1

1. Number of chromosome sets that are found in the nucleus: 23 haploid (n) , 46 diploid (2n)
2. Diploid: something that has both gametes involved – whereas haploid only has one.

Question 2

Meiosis I: What happens during Prophase I?

Answer 2

Synapsis occurs: chromosomes pair up and crossing over occurs. (90% of meiosis is here)

Question 3

Meiosis I: What happens during Metaphase I?

Answer 3

Homologous chromosomes arrange in pairs and arrange themselves at the equator.

Question 4

Meiosis I: What happens during Anaphase I?

Answer 4

Spindle fibres pull apart homologous pair to poles (disjunction).

Question 5

Meiosis I: What happens during Telophase I?

Answer 5

Pairs of homologous chromosomes reach poles, they now all have haploid set.

Question 6

Meiosis II: What happens during Prophase II?

Answer 6

Spindle forms and there are two diploid cells.

Question 7

Meiosis II: What happens during Metaphase II?

Answer 7

Chromosomes are lined up on metaphase plate (equator) in single-filled line.

Question 8

Meiosis II: What happens during Anaphase II?

Answer 8

Centromere begin separation of sister chromatids – the sister chromosomes become individual chromosomes.

Question 9

Meiosis II: What happens during Telophase II?

Answer 9

Cells split completely and 4 daughter cells are now independently assorted.