2.3b Meiosis

Question 1

Meiosis

Answer 1

Meiosis is the division of the nucleus that results in the formation of haploid gametes from a diploid gametocyte.

Question 2

how do chromosomes look in diploid cells

Answer 2

In diploid cells,chromosomes typically appear as homologous pairs.

Question 3

Homologous chromosomes

Answer 3

Homologous chromosomes are chromosomes of the same size, same centromere position and with the same sequence of genes at the same loci.

Question 4

Meiosis 1: step 1

Answer 4

Chromosomes replicate, pair up and crossing over occurs.

Crossing over can result in new combinations of the alleles of these genes. It is random and produces genetically different recombiant chromosomes.

Question 5

Meiosis 1: step 2

Answer 5

Spindle fibers attached and chromosomes align in the middle of the cell at the equator.

Question 6

Meiosis 1: step 3

Answer 6

Chromosomes are pulled apart and move towards opposite poles.

Question 7

Meiosis 1: step 4

Answer 7

Cytokineses occurs and two daughter cells form

Question 8

Meiosis 2: step 1

Answer 8

Each of the two cells produced in meiosis 1 undergoes a further division during which the sister chromatids of each chromosomes are separated. So a total of four haploid cells are produced.

Question 9

What is independent assortment?

Answer 9

The orientation of pairs of homologous chromosomes at the equator is random. And it is positioned independently of the other pairs, irrespective of their maternal and paternal origin.