Process

Question 1

Interphase

Answer 1

cell carries out normal metabolic functions
dna replication occurs to double the gentic material for cell division

Question 2

What is Meiosis 1?

Answer 2

reduction division wherby two haplic cells are formed

Question 3

Prophase 1?

Answer 3

1. short fat chromosomes (thicken)
2. homologous pair lie next to each other and form bivalents through synapsis
3. spindle develops
4. nuclear membrane disssappears

Question 4

metaphase 1?

Answer 4

1. bivalents line up RANDOM on equator
2. spindle attached from eacch centriole to the centromere of each of the chromosomes

Question 5

Anaphase 1?

Answer 5

1. spindle contract
2. centromere does not split and each chromosome is pulled to the respective poles

Question 6

Telophase 1?

Answer 6

Nuclear membrane appears
cytoplasm divides and each cell will have half number of chromosomes
invagination occurs and cleveage furrow
spindle disentigrates

Question 7

Explain crossing over?

Answer 7

bivalents are formed through synapsis
early metaphase and late prophase and mutual exchange of chromosome segments at a chiasma between the bivalents
forms chromosomes with recombitant dna and parental chromatid
allows for genetic variance and mutations for evolution

Question 8

What is meiosis 2?

Answer 8

copying division to increase number of gametes while remain haploid (form 4 daughter cells)

Question 9

Explain The 4 phases of meiosis 2?

Answer 9

prophase- nuclear membrane dissappear
spindle develops from each centriole
chromosomes with chromatids at centromere
metaphase- single chromosomes line up on equator and are linked by spindle fibres
anaphase- spindle contracts to pull chromatids to each pole and centromere split
Telophase- invagination- cleveage
nuclear membrane cytoplasm divides

Question 10

What is the result of meiosis?

Answer 10

Four haploid non identical daughter cells formed from one diploid parent cell and are also not identical to parent cell