Ch 26 Pre-HW

After DNA replication, each individual chromosome becomes a homologous pair.

False

Which of the following is true about oogenesis?

It releases an immature gamete each month.

Which hormone is directly responsible for the development of secondary sex characteristics in males?

Testosterone

Which of the following is NOT produced by meiosis?

a liver cell

The process by which immature follicles degenerate and are resorbed during the follicular phase of the menstrual cycle is called __________.

atresia

Secondary oocytes form __________.

between puberty and menopause

Use of anabolic steroids leads to elevated concentrations of testosterone and testosterone derivatives. Prolonged use of anabolic steroids may lead to __________.

decrease in LH and FSH

Mitosis produces cells that are ___________; meiosis produces cells that are ___________.

diploid; haploid

When does the total number of chromosomes get reduced from 46 pairs to 23 individual chromosomes?

during meiosis I

The term __________ describes the movement of sperm and accessory gland secretions into the urethra.

emission

All of the following are female secondary sex characteristics EXCEPT __________.

enlarged larynx

Meiosis starts with a single diploid cell and produces

four haploid cells.

Which of the following is a likely result of meiosis?

four sperm, each with 23 chromosomes

The primary sex organs are also called __________.

gonads

In the female reproductive system, FSH stimulates __________.

granulosa cells to produce estrogens

During prophase I of meiosis,

homologous chromosomes stick together in pairs.

A cell preparing to undergo meiosis duplicates its chromosomes during

interphase.

Chromosomes can exchange genetic information during a process called "crossing over." This occurs when homologous chromosomes are lined up in pairs. When does this happen?

metaphase I

The hormone produced by the corpus luteum that is the primary ovarian hormone after ovulation is __________.

progesterone

Synapsis and crossing over takes place during __________.

prophase I of meiosis

The correct order of events during meiosis is

prophase I, metaphase I, anaphase I, telophase I, cytokinesis, meiosis II.

During meiosis, segments of nonsister chromatids can trade places. This recombination of maternal and paternal genetic material is a key feature of meiosis. During what phase of meiosis does recombination occur?

prophase I.

Two identical copies of the same chromosome are called __________.

sister chromatids

The stem cells that give rise to new sperm are called __________.

spermatogonia