Multiple Alleles, Polygenic Traits, Sex-linked Traits, Pedigrees

Why is the gene for a disease or disorder more likely to be found on the X chromosome than Y?

• The X chromosome has many more genes
• The Y chromosome has many more genes

Males are more likely to suffer from a sex-linked disease or disorder because

• males are the weaker sex
• males have less DNA
• males have 1 X chromosome, so the disorder is more likely to be expressed

When we say that a woman is a carrier for a genetic disease or disorder it means that

• she has 1 allele, but not the disorder

• she has 2 allele for the disorder

• she can pass the allele only to male children

• she can pass the allele only to female children

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Hemophilia is a recessive x-linked disorder.
Which genotype represents a female who is a carrier for hemophilia?

• X^HX^h
• X^hX^h
• X^HX^H
• X^hY

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Hemophilia is a recessive x-linked disorder.
Which genotype represents a male with hemophilia?

• X^HX^h
• X^hX^h
• X^HY
• X^hY

Tags

NGSS.HS-LS3-1

If a woman is a carrier for a sex linked recessive trait of hemophilia and her husband has hemophilia, which of the following is true? Make a punnett square!

• All sons will have hemophilia

• all daughters will have hemophilia

• 50% of daughters and 50% of sons have hemophilia

• 100% of sons have hemophilia and 100% of daughters are carriers

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In fruit flies, eye color is a sex linked trait. Red is dominant to white. What would be the percentages of offspring of a cross of a white eyed female with a red-eyed male?

• 1 female white eyes, 1 female red-eyes, 1 male white eyes, 1 male red-eyes
• 2 female red eyes, 2 males white eyes
• 2 female white eyes, 2 males red eyes
• 2 female red eyes, 1 male red eyes, 1 male white eyes

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What would be blood groups of the offspring of heterozygous father with blood group A and mother homozygous for B?

• A and B

• AB and A

• O

• AB and B

Tags

NGSS.HS-LS3-2

A man with type O blood is accused of being the father of a type B baby. The mother is type A. Could this man be the father? 

• Yes 
• No

Tags

NGSS.HS-LS3-1

I have 2 X chromosomes. What am I?

• Male
• Female