Meiosis

Question 1

Germ cell

Answer 1

Cell of the reproductive organs (testes, ovary)

Question 2

Oogenes

Answer 2

process of making eggs. Occurs in ovary of female.

Question 3

Spermatogenesis

Answer 3

Process of making sperm. Occurs in testes.

Question 4

Homologous chromosomes

Answer 4

Paired chromosomes of the same size; one from mother, one from father.

Question 5

Tetrad

Answer 5

A set of 4 chromatids from two homologous chromosomes.

Question 6

Tetrad

Answer 6

A set of four chromatids from two homologous chromosomes.

Question 7

Crossing over

Answer 7

The exchange od genetic material (DNA) (Genes) from one tetrad to another. Occurs during prophase of meiosis 1.

Question 8

Non-sister chromatids

Answer 8

Chromatids from two different chromosomes.

Question 9

Nondisjunction

Answer 9

Describes the process of pairs of homologous or sister chromatids that fail to separate normally during anaphase.

Question 10

Recombination DNA

Answer 10

The combination of DNA from two different organisms

Question 11

Variation

Answer 11

Varied; Different

Question 12

Diversity

Answer 12

Different; DIverse

Question 13

Ova/ Ovum/egg

Answer 13

female gamete (sex cell) contains half the number of chromosomes as a body cell.

Question 14

Sperm

Answer 14

Male sex cell; gamete

Question 15

Fertilization

Answer 15

The process of sperm and egg unity in the fallopian tube of a female.

Question 16

Internal fertilization

Answer 16

The process of fertilization that occurs inside the body of a female organism.

Question 17

External fertilization

Answer 17

The process of fertilization that occurs outside the body of a female organism (often in water).

Question 18

Fallopian tube

Answer 18

Structure of the female reproductive system where fertilization occurs.

Question 19

Blastocyst

Answer 19

Collection of cells that forms from a zygote (the fertilized egg)

Question 20

Zygote

Answer 20

Fertilized egg that develops into an embryo and then a fetus.

Question 21

Stem cell

Answer 21

Unprogrammed, undifferentiated embryonic cell.

Question 22

Placenta

Answer 22

Temporary reproductive organ that developes during fetal development. It supplies fetus with oxygen and nutrients.

Question 23

Uterus

Answer 23

Female reproductive organ where implantation of zygote and fetal development occurs.

Question 24

Umbilical cord

Answer 24

Structure that attaches fetus to placenta. Diffusion of nutrients and waste between fetus and placenta occur here.

Question 25

Trisomy 21

Answer 25

Occurs because of non-disjunction at chromosome. 21. Also called down syndrome.