Unit Five Mendelian Genetics Test Review

In humans, wavy hair results by codominance when a curly-haired individual mates with a straight-haired individual. What phenotypes would be predicted for the offspring of the cross between a curly-haired man and a wavy-haired woman?

• • All offspring definitely would have curly hair.

• • Half have curly hair, and half have wavy hair.

• • Half have wavy hair, and half have straight hair.

• • Half have curly hair, and half have straight hair.

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-1

A man and a woman are both heterozygous for phenylketonuria (PKU), an autosomal recessive genetic disorder. Why might they be concerned about having children?

• • There is a 25% chance their children will have the disorder.

• • There is a 50% chance their sons will have the disorder.

• • There is a 50% chance their daughters will be carriers of the disorder.

• • There is a 75% chance their children will have the disorder.

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Color blindness is a sex-linked recessive disorder. The gene for this trait is found on the X chromosome. What are the chances of a child born to a carrier mother and a normal father developing color blindness?

• • male child, 0 out of 2

• • male child, 2 out of 2

• • female child, 0 out of 2

  • D

• • female child, 2 out of 2

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-1

In dogs, hereditary deafness is caused by a recessive gene (d). A kennel owner has a male dog that she wants to use for breeding. She crosses her dog with a female deaf dog to determine her dog's genotype.

Which statement best describes how this cross will help to determine her male dog's genotype?

• • If all the puppies can hear, the male dog's genotype is Dd.

• • If all the puppies can hear, the male dog's genotype is dd.

• • If any of the puppies are deaf, the male dog's genotype is DD.

• • If any of the puppies are deaf, the male dog's genotype is Dd.

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-1

In wrens, feather color inheritance is an example of incomplete dominance, so B represents black feathers, and W represents white feathers. If a wren with genotype WW is mated with a wren with genotype BB, what is the likelihood that their offspring will have grey feathers?

• • 25%

• • 50%

• • 75%

• • 100%

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Analyze the pedigree that shows the inheritance of a trait over three generations.

What type of inheritance is shown?

• • codominance

• • dominance

• • incomplete dominance

• • sex-linked

If a man with type O blood marries a woman with type AB blood, what are the chances that their first child will have type O blood?

• • 0%

• • 25%

• • 50%

• • 75%

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-1

NGSS.HS-LS3-3

A student is investigating flower petal color and finds that there is a wide variety of phenotypic options in a certain species ranging from light blue to dark blue, with many other shades of blue in between. What mode of inheritance is shown in this species of flowers for petal color? 

• Multiple Alleles

• Polygenic Trait

• Environmental Effect

• Incomplete Dominance

A plant has pink flowers one summer, and the next summer the flowers on the same plant are blue. Which statement best explains the change in flower color?

• • The gene for flower color became mutated after a large amount of rainfall.

• • The gene for flower color was affected by the chemical make-up of the soil.

• • The flower color was changed after an insect ate the flowers at the end of the first summer.

• • The flower color was changed after a cold winter damaged the flowers from the first summer.

Tags

NGSS.HS-LS2-6

NGSS.HS-LS4-5

The sex of the person in this Karyotype is _______​ ​ (a)   , and chromosomes 1 -22 are called _________​ (b)   . 

• autosomes
• sex chromosomes
• female
• male