week 4

Question 1

human chromosomes

Answer 1

46 chromosomes
23 pairs of homologous chromosomes (maternal and paternal set)
22 pairs of autosomes
1 pair of sex chromosomes

Question 2

diploid cell

Answer 2

diploid number of chromosomes
2n = 46 = 2 sets of chromosomes

Question 3

haploid cell

Answer 3

haploid number of chromosomes
n=23 = 1 set of chromosomes

Question 4

mitosis

Answer 4

process by which cells are replicated for growth, repair etc (and some in asexual reproduction)
produces 2 daughter cells, each diploid (2n)

Question 5

meiosis

Answer 5

process by which gametes are produced
produces 4 daughter cells
each haploid (n)

Question 6

meiosis I

Answer 6

reductional division
homologous pairs are separated reducing chromosome number by half
interphase I, prophase I, metaphase I, anaphase ~I

Question 7

meiosis I process

Answer 7

Int I- chromosomes duplicate
Pro I- homologous chromosomes pair and exchange segments- synapsis- pairing of homologs to form tetra
Met I- tetrads line up
Ana I- pairs of homologous chromosomes split up

Question 8

meiosis II

Answer 8

equational division- sister chromatids are separated producing 4 haploid gametes (analogous to mitosis)