Chapter 22 Reproductive System

Question 1

Gametes

Answer 1

sex cells

Question 2

Spermatozoa

Answer 2

male sex cells, haploid

Question 3

Ova (egg)

Answer 3

female gametes, haploid

Question 4

Zygote

Answer 4

fusion of male and female gamete

Question 5

Diploid

Answer 5

46 chromosomes

Question 6

Haploid

Answer 6

23 chromosomes

Question 7

Endometrium

Answer 7

innermost layer of the uterus; composed of two portions.

Question 8

Myometrium

Answer 8

middle and thickest layer of uterus, muscular layer

Question 9

Epimetrium

Answer 9

outermost and thinnest layer

Question 10

Fimbriae

Answer 10

fingerlike projections at the open end of the uterine tube; constant movement of the fimbriae create a current that draws the released ovum into the uterine tube toward the uterus.

Question 11

Oogenesis

Answer 11

production of eggs in ovary; unequal cytokinesis produces one secondary oocyte and one polar body. Secondary oocyte divides into one egg and one polar body. Polar body may or may not divide into two more polar bodies. PRODUCTS= one egg and two/three polar bodies

Question 12

Spermatogenesis

Answer 12

sperm produced in seminiferous tubules; produces four haploid cells which mature into sperm. Sperm are stored in epididymis.

Question 13

Mitosis vs. Meiosis

Answer 13

Meiosis produces four haploid daughter cells;
Mitosis produces two diploid daughter cells.
Meiosis has recombination and only occurs in sex cells.
Mitosis is somatic cell division.

Question 14

Stages of Meiosis I

Answer 14

Prophase I: Crossing over
Metaphase I: tetrads line up at middle
Anaphase I: homologous chromosomes separate
Telophase I: cells pull apart, each has one of replicated chromosomes from each homologous pair of chromosomes

Question 15

Stages of Meiosis II

Answer 15

Prophase II
Metaphase II: Chromosomes align at middle
Anaphase II: Sister chromatids separate
Telophase II: Cells pull apart