Exam 30: Reproductive System Too Many Multiples

Identical twins have nearly the same genes,whereas fraternal twins do not.In fact,around half of all fraternal twins are male and female siblings.Alternate terms for identical and fraternal twins are monozygotic and dizygotic.Why do you think these terms are used? Explain your answer in terms of what you know about fertilization.

Sperm are produced by the ________.

Sperm enters the female reproductive system at the ________.

Prior to ejaculation,sperm are mixed with fluids from accessory glands such as the prostate to create semen.What are the functions of this accessory gland fluid?

A fertilized egg is called a ________.

Women are given fertility drugs to stimulate ovulation in ________.

If an embryo implants in the endometrium,__________.

What are some of the reasons that ovaries may fail to produce eggs?

Follicle-stimulating hormone is to estrogen as estrogen is to __________.

Explain how the combination birth control pill (containing both estrogen and progesterone)uses a negative feedback loop to prevent conception.

Most of the testes are filled with the ________.

The maximum number of sperm that can successfully fertilize an egg is ________.

Precursor sperm cells have _______ of every chromosome,and sperm have _______ of every chromosome.

Which of the following BEST distinguishes between zygotes and embryos?

The human structure that is most similar to a bird's cloaca is the _________.

Follicle-stimulating hormone ________.

Which of the following correctly lists the structures through which sperm must pass from entry into the female reproductive tract to the site of fertilization?

Compare and contrast costs and benefits of internal fertilization,such as in mammals,and external fertilization,such as in fish.

Embryos implant into the ________,a specialized tissue that lines the ________.

The developing follicle secretes ________.