Humam Reproduction

The number in each circle below represents the chromosome number of the cell. Which diagram represents the production of offspring by an asexually reproducing organism?

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When an organism reproduces asexually, it usually has

• only one parent, and half as much DNA as the parent

• only one parent, and the same chromosome number as the parent

• two parents, and twice as much DNA as either parent

• two parents, and the same chromosome number as each parent

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 le

• hormones that stimulate placenta formation in the ma

Identify the structure within which the egg cell is normally fertilized.

• A

• B

• C

• D

The reproductive structure in a female mammal that produces sex cells is the

• Ovary

• Testes

• Uterus

• Placenta

Human reproduction usually involves

• internal fertilization and internal development

• external fertilization and external development

• internal fertilization and external development

• external fertilization and internal development

Which structure is correctly paired with its function?

• ovary — provides milk for newborns

• testis — development of sperm

• placenta — storage of released eggs

• uterus — produces estrogen

The diagram below represents structures found in the female reproductive system. If the areas labeled B were completely blocked on both sides, the most likely result would be that

• egg and estrogen production would stop

• sperm and insulin production would stop

• fertilization would not occur

• an embryo would develop

Which structure produces chemicals that regulate the reproductive cycle?

• A

• B

• C

• D

What change would occur immediately if both structures labeled B were damaged or blocked?

• Structure A would decrease in size.

• The blood supply to structure E would decrease.

• Gametes would no longer be transported to structure C.

• Structure D would be able to deliver more gametes.