Meiosis 9 Flashcards Preview

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Flashcards in Meiosis 9 Deck (26):
1

Embryo

Develops a form of zygote.

2

How many body cells do humans have.

46 chromosomes

3

Diploid

2 set of chromosomes

4

Haploid

1 set of chromosomes

5

The process of meiosis produce gametes with ________ as body cells

1/2 the number of chromosomes (23 from each parent)

6

Sexual Reproduction

Requires 2 parents and increases genetic diversity.

7

Gametes

Specialized cells; sperm from males and eggs from females.

8

Genetic Diversity

Variety in species.

9

Homologous chromosomes

Matching chromosomes

10

Zygote

New diploid cell formed by the process of fertilization.

11

Meiosis 1

Starts with a diploid cell and ends with 2 haploid cells

12

Meiosis 2

Starts with a diploid cell and ends with 4 haploid cells.

13

Interphase 1

Same as everything in mitosis

14

Fertilization

Process in which from two parents combine.

15

Prophase 1

Chromosomes begins to condense and pair up. Align with their homologous partner so they match up.

16

Prophase 2

Daughter cells only have 1 copy of each homologous chromosome
No synapsis/crossing over.

17

Metaphase 2

Sister chromatids line up across the middle of the cell and is completely random.

18

Anaphase 2

Pulled to the end of the cell.

19

Telophase 2

Cytoplasm is reformed
(2 cells one cytoplasm)

20

Cytokinesis

Separation of 2 cells resulting in 4 unique haploid cells.

(Gametes)

21

Interphase

G1: Growth and preparation
S: DNA replication
G2: Grows more and prepares for mitosis

22

Prophase Early

Replicated DNA coil into x-shape chromosomes

23

Prophase Late

Spindle fibres attach to centromere

24

Metaphase

Spindle fibres pull the chromosomes into a single line.

25

Anaphase

Spindle fibres contract and pull centromere apart separating sister chromatids.

26

Telophase

Spindle fibres disappears.
Nucleus membrane forms around a DNA.
Nucleulos returns.