Exam 37: A: Genetics and Heredity

The inheritance of a genetic risk factor is not sufficient to cause a disease.

A Punnett square can be used to detect Down syndrome.

Mitochondrial inheritance is known to transmit genes for several degenerative nerve and muscle disorders.

A person with sickle cell trait has some normal beta hemoglobin chains in his or her blood.

A color-blind woman must have had a color-blind father.

In determining blood type,type A and type B are codominant to the recessive O type.If one parent had type A blood and one parent had type B blood,they could not have a child with type O blood.

A female who is red-green color blind must be heterozygous for the condition.

The X chromosome and the Y chromosome are the same size.

There is no such thing as a heterozygous color-blind female.

Both males and females have an X chromosome.