Practice Test 2019 Genetics 2

In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (r). What is the sex and eye color of flies with the following genotype: X ^R X ^r ?

• male with white eyes

• female with red eyes

• male with red eyes

• female with white eyes

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (r). What is the sex and eye color of flies with the following genotype: X ^R Y ?

• male with white eyes

• female with white eyes

• male with red eyes

• female with red eyes

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What percentage of the offspring will have this recessive disease?

• 0%
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

What percentage of the female offspring will be a carrier for this recessive disease?

• 0%
• 50%
• 100%
• 25%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Looking at this pedigree, how many female family members are carriers?

• 1
• 3
• 10
• 7

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Looking at this pedigree, how many family members have the disease?

• 4
• 7
• All
• None

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

How many PAIRS of chromosomes do humans have?

• 23
• 46
• 1
• 2

Tags

NGSS.HS-LS3-2

I have 2 X chromosomes. What am I?

• Male
• Female

The sex of a child is determined by

• whether the father's sperm contains an x or y chromosome
• whether the mother's egg contains an x or y chromosome
• the age of the parents

Tags

NGSS.HS-LS3-1

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

Tags

NGSS.HS-LS3-1