Human Genetics Review

A syndrome caused by the presence of only one X sex chromosome is....

• Klinefelter syndrome

• Huntington's disease

• Duchenne Muscular dystrophy

• Turner Syndrome

Hemophilia is caused by a....

• dominant gene on the X chromosome

• dominant gene on the Y chromosome

• recessive gene on the X chromosome

• recessive gene on the Y chromosome

A female carrier of hemophilia could also be described as...

• colorblind

• Heterozygous normal

• pure recessive

• heterozygous colorblind

Which represents a genotype for someone who has hemophelia?

• X^HY

• X^hY

• X^HX^H

• X^HX^h

A man is known to be heterozygous for cystic fibrosis. His wife is homozygous normal. Of their four children, what percentage is likely to show the disorder?

• 0%

• 25%

• 50%

• 100%

Karyotypes are used...

• as a method of treating hemophilia

• to detect genetic disorders which result from an abnormal number of chromosomes

• to detect genetic disorders which result from an abnormal dominant or recessive gene

• in making sugar cookies.

Why can't punnett squares be used to predict the inheritance of traits like eye and hair color in humans?

• these traits are controlled by more than one gene

• Because eye and hair color are not controlled by genes

• Hair color and eye color are related to the sex of the individual

• Punnett squares can be used to predict these traits.

The code contained in a particular gene results in the production of...

• variety of type of chemicals

• a specific protein

• certain types of DNA molecules

• particular carbohydrate molecules

In chorionic villi sampling, cells are collected from...

• the other

• the fetus

• the amniotic fluid

• extensions of the placenta

A disorder in which red blood cells cannot transport oxygen efficiently is:

• hemophilia

• sickle cell

• PKU

• achondroplasia