Genetics & Pedigree

What are sex chromosomes?

• extra chromosomes

• somatic

  chromosomes

• X and Y

  Chromosomes

• All of the above

What is true of hemophilia?

• It is an x linked recessive disease

• it is rare in women

• mothers are carriers

• All of the above

Helpful, harmful, and neutral describe all types of...

• Cells

• Mutations

• diseases

• chromosomes

What is a pedigree?

• A diagram

• It has several generations of a family

• It shows certain genetic disorders

• All of the above

Blood type is a good example of....

• Codominance

• Hemophilia

• a sex linked trait

• Autosomal Dominance

"Rr" is an example of

• A sex linked recessive trait

• an autosomal trait

• a recessive allele

• A homozygous dominant trait

An autosomal dominant trait in a pedigree...

• is found equally in males and females

• means that each person who has it has one parent that has it

• is shown by shaded boxes

• All of the above

In an autosomal recessive disease where both parents are carriers, what is the chance of a child having the disease?

• 0%

• 25%

• 50%

• 100%

If a characteristic is rarely seen in females, females tend to be carriers, and it skips a generation it is probably a

• an autosomal gene

• sex-linked trait

• somatic mutation

• virus

If a trait is located on the X-chromosome it ....

• is sex linked

• is only inherited by females

• cannot be inherited

• occurs only in adults