Do Now Quiz (Quarter 3)

During a cell division cycle, chromosome segments from two homologous chromosomes exchange places. Which result is most likely to occur following this cycle?

• Genetic material will be lost.

• The number of chromosomes will increase.

• The total number of genes in the cell will decrease.

• A change in gene location will occur on both chromosomes.

At a point in the cell cycle, chromosomes have aligned near the middle of a cell. Which sequence of events will the cell need to complete to produce two identical daughter cells?

• anaphase → telophase → cytokinesis

• anaphase II → telophase II → cytokinesis II

• prophase → metaphase → anaphase

• metaphase II → anaphase II → telophase II

The ameba, a single-celled organism, reproduces asexually. Variations in an ameba would most commonly occur through

• differentiation during development

• the fusion of gametes

• random mutations

• recombination during fertilization

The human female reproductive cycle is regulated primarily by the

• white blood cells of the circulatory system

• muscle cells of the skeletal system

• enzymes of the digestive system

• hormones of the endocrine system

• Meiosis = 1; Fertilization = 3

• Meiosis = 2; Fertilization = 5

• Meiosis = 3; Fertilization = 4

• Meiosis = 4; Fertilization = 5

The human male reproductive system is adapted for the production of

• sperm and the delivery of these cells for internal fertilization

• gametes that transport food to the egg

• zygotes and the development of these cells into a fetus

• hormones that stimulate placenta formation in the male

• A

• B

• C

• D

• half of their chromosomes from each parent

• double the amount of chromosomes from each parent

• pairs of chromosomes from each parent

• double the amount of chromosomes from one parent

Which statement is characteristic of reproduction in humans?

• The reproductive cells of males and females differ in chromosome number.

• Males and females produce gametes in the ovaries.

• Males and females produce the same number of gametes.

• The reproductive cycles of males and females are regulated by hormones.

Exposure to certain environmental toxins, such as pesticides, may reduce fertility in males by interfering with their ability to produce gametes. These toxins are most likely having an effect on the

• testes and progesterone

• ovaries and testosterone

• ovaries and estrogen

• testes and testosterone