Lab 2 (mitosis, meiosis)

Question 1

In which stage of mitosis does the nuclear membrane begin to disappear and chromatin coils into double chromosomes?

Answer 1

Prophase

Question 2

16 Tetrads = ? chromosomes

Answer 2

32 chromosomes (2n)

Question 3

what stages of meiosis will give you haploid number of chromosomes?

Answer 3

Telophase I, Prophase II, Metaphase II, Telophase II

Question 4

what phases of meiosis will give you diploid number of chromosomes?

Answer 4

Prophase I, Metaphase I, Anaphase I, Anaphase II

Question 5

What are at least 2 differences between a cell in metaphase I and a cell in metaphase II?

Answer 5

1) Metaphase I the cells have a diploid number of chromosomes. And homologous chromosomes are aligned to separate 2) Metaphase II cells have a haploid number of chromosomes. Sister chromatids align to separate.

Question 6

At what point do you think chromosome reduction is completed

Answer 6

Telophase I

Question 7

Name of the location where sister chromatids join

Answer 7

Centromere

Question 8

Explain equational division

Answer 8

similar to mitosis will occur whereby the sister chromatids are finally split, creating a total of 4 haploid cells (23 chromosomes)

Question 9

Explain reductional division.

Answer 9

Meiosis I separates homologous chromosomes, producing two haploid cells (N chromosomes, 23 in humans), and thus meiosis I is referred to as a reductional division.

Question 10

What is the name of a small body in a cell where microtubules are produced. In animal cells it surrounds the centriole

Answer 10

Centrosome

Question 11

Homologous chromosome

Answer 11

Homologous chromosomes are chromosome pairs, one from each parent, that are similar in length, gene position and centromere location.