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1

Mitosis

Produces two daughter cells that are identical to the parent cell. This is the type of division involved in growth and repair of the body

2

Meiosis

Produces gametes (eggs and sperm) that have half the number of chromosomes of the parent cell

3

What are the six stages of mitosis

Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis

4

How many chromosomes in a body cell

46

5

What is the diploid number

The number of chromosomes in your body cells

6

What is the haploid number

The number of chromosomes in a gamete

7

Give five situations in which cell division in meiosis occurs

Growth
Asexual reproduction
Wound and tissue repair
Tissues regeneration
Research, tissue culture and tissue engineering

8

What are eukaryotic cells

Unicellular organisms with a nucleus

9

Interphase

Chromosomes replicate to have two chromatids

10

Prophase

Replicated chromosomes and their chromatids become visible

11

Metaphase

Chromosomes line up along the equator of the cell and a network of fibres appears extending from the poles of the cell to each chromosome.

12

Anaphase

The chromatids separate to become two independent chromosomes. The network of fibres contracts, pulling the chromosomes to opposite poles of the cell.

13

Telophase

Two nuclei form, each with the same number of chromosomes as the parent cell

A new nuclear membrane encloses the chromosomes at each pole. The chromosomes uncoil and are no longer visible as individual strands.

14

Cytokinesis

Division of the nucleus is complete. The cytoplasm then divides and the result is two identical daughter cells.

15

What are the stages of meiosis

Metaphase 1, anaphase 1, telophase 1, metaphase 2, anaphase 2, telophase 2

16

Metaphase 1

Replicated chromosomes form homologous pairs, attached to spindle fibres and lined up in the middle

17

Anaphase 1

One replicated chromosome of each pair moves to each pole

18

Telophase 1

Two cells are formed, each with one replicated chromosome

19

Metaphase 2

Chromosomes line up on the equator attached to spindle fibres

20

Anaphase 2

Chromatids separate and move to poles

21

Telophase 2

Four cells result with one copy of each chromosome, they are haploid gametes

22

RR

homozygous dominant

23

rr

Homozygous recessive

24

Rr

Heterozygous

25

Genotype

RR, Rr and rr represent the genotypes which are the actual genetic information carried by an individual

26

Phenotype

The red or white colour is the phenotype which are the observable characteristics or traits of the individual

27

What are sex linked genes

Found on the sex chromosomes and determine the sex

28

If colour blindness is a recessive allele, How would you represent a female who is heterozygous for for colour blindness and normal vision is dominant?

N n
X X

This female may not have colour blindness but she is a carrier.

29

Since colour blindness is an X linked genetic disorder, how would you represent a male who is colour blind

n
X Y

30

homozygous

When an individual has two of the same allele, whether dominant or recessive, they are homozygous.

31

heterozygous

When an individual has two different alleles, one dominant and one recessive.

32

plasmid

a genetic structure in a cell that can replicate independently of the chromosomes