Genetics Pre-Assessment

Which of the following genotypes would code for a dominant phenotype? Select all that apply.

• AA

• Aa

• aa

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which of the following best describes the genotype "Rr"?

• recessive

• heterozygous

• purebred

• all of the above

Which of the following genotypes are homozygous? Select all that apply.

• Aa

• BB

• dd

If tall plants are dominant and short plants are recessive, how would you write the genotype for a homozygous tall plant?

• BB

• Bb

• bb

If black fur is dominant and white fur is recessive, what genotype would an organism with white fur have?

• FF

• Ff

• ff

Tags

NGSS.HS-LS3-1

Which of these Punnett squares represents a cross between a homozygous dominant parent and a heterozygous parent?

• 
• 
• 
• 

Tags

NGSS.HS-LS3-1

In pea plants, being tall is dominant and being short is recessive. Two tall plants mate. One has the genotype Tt and the other has the genotype TT. What is the chance that they will have a tall offspring?

• 0%

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

If both parents have the genotype Aa, what is the chance their offspring will also have the genotype Aa?

• 0%

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In humans, being able to curl your tongue is a dominant trait and NOT being able to curl you tongue is a recessive trait. If a mom with the genotype Rr has a child with a dad with the genotype Rr, what is the probability that their child will be able to curl its tongue?

• 0%

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Cody crosses a plant producing wrinkled peas with a plant producing smooth peas. Weeks later, he discovers that all the offspring plants have smooth peas. Cody drew the Punnett square above to show the genotypes of the offspring plants. What were the genotypes of the parent plants?

• RR and rr

• Rr and Rr

• RR and Rr

• Rr and rr