Exam 7: Development and Sex Determination

Duchenne muscular dystrophy is,for all practical purposes,a(n)____________________ trait.

In addition to fertilizing the egg,sperm also ____.

Explain how X inactivation can result in female mosaicism and give examples.

How is the timing of gamete formation in females different than that in males?

Phenotypic sex is determined at the moment of fertilization.

Females outnumber males in the tertiary sex ratio because genetic and ____________________ factors cause higher death rates among males.

During the 1968 Olympic Games,the International Olympic Committee performed an analysis of ____ on all female athletes in order to verify their sex.

The most important events in human development occur during the ____.

Explain how sex-limited genes are inherited and give an example of this type of inheritance.

Describe the interactions between genes and the environment in the sex determination of some reptiles; explain their relevance to human sex determination.

The formation of _____ depends on gene action,interactions within the embryo,interaction with other embryos that may be in the uterus,and interactions with the maternal environment.

Explain why a pregnant woman should not have an abdominal X-ray and identify the possible consequences to the fetus if she does.

Complete androgen insensitivity causes XY males to become phenotypic females.

Describe how the previous assumption regarding the development of sexual identity and the treatment for ambiguous genitalia has changed in recent years.

The process of ____________________ equalizes the amount of X chromosome gene products in both sexes.

A collection of birth defects caused by alcohol consumption during pregnancy is known as ____________________.

By the end of the first trimester of pregnancy,all of the major ____________________ have formed and are functional.

The part of the male reproductive system where sperm mature is known as the ____.

The inner lining of the uterus that is shed at menstruation if fertilization has not occurred is called the ____.

Teratogenic effects of alcohol only occur during the first 12 weeks of pregnancy.