bio unit 3 meiosis

Question 1

Body cell

Answer 1

• also known as somatic/diploid cell
• all cell in organism is body other than egg and sperm
• has a full set of chromosomes

Question 2

Sex cells

Answer 2

• also known as gametes
• are haploid- half the set of chromosomes
  Gametes are eggs or sperm. In plants ovules or pollen

Question 3

Diploid

Answer 3

2n
Cells have both set of chromosomes
Somatic/body cells

Question 4

HapLoid

Answer 4

n
Cells have only one set of chromosomes
Are gametes

Question 5

homologous chromosome

Answer 5

Paired chromosomes are called this. These chromosomes have genes for the same trait in the same order

Question 6

mitosis reveiw

Answer 6

mitosis - for growth and repair

Has one cell division, happens in all body cells, results in 2 identical diploid cells.

Question 7

Overview of meiosis

Answer 7

Function : to produce gamete cells with half the number of chromosomes for sexual reproduction.
Has 2 cell division and only occurs in gamete cells.

Question 8

Definition of meiosis

Answer 8

the division for making gametes before sexual reproduction

Question 9

Independant assortment

Answer 9

A process in meiosis in which replicated chromosomes are randomly divided among all daughter cells. Allow variation and genetic diversity.

Question 10

Chromosome reduction

Answer 10

produces haploid cells from diploid cells. This creates new combinations of of traits which increases genetic diversity.

Question 11

Crossing over

Answer 11

when homogous chromosomes line up and exchange genetic info. Results in Genes moving from one chromosome to another. This increases genetic variation.

Question 12

Meiosis 1 overview

Answer 12

more important as it accomplishes most things. Reduces diploid to haploid. Crossing over in prophase 1 and independant assortment in anaphase 1.

Question 13

Meiosis 1 in dept

Answer 13

I,P1,M1,A1,T1 + cytokininesis

• crossing over in prophase 1
• homologous chromosomes=ones separate in metaphase 1
  2 new cells are formed

The cells have : no complete set of chromosomes are differnt from each other.

Question 14

Meiosis 2 overveiw

Answer 14

remotes chromosome to chromatid
- each haploid cells from meiosis 1 divided to from 4 haploid cells

Question 14

meiosis 2 indent

Answer 14

P2,M2,A2,T2

No DNA replication
- chromatids separate as centromere divides, in anaphase 2
- the happily cells are differnt from each other.

Question 15

After meiosis

Answer 15

in fertiliztation during sexual reproduction creates more genetic variation.