Genetics Assessment

What are some traits of this opossum? Check all that apply.

• covered in scales

• covered in fur

• gray

• green

Why do scientists use Punnett squares?

• to determine exactly what traits the grandparents of an offspring had

• to predict how many offspring parents will have and when they will have them

• to determine all the possible genotypes and phenotypes of offspring that result from a genetic cross

• none of the above

Having wrinkled (r) seeds is a recessive trait in pea plants. The Punnett square above shows a cross between

two pea plants and the potential allele combinations of their offspring. What is the phenotype for the allele

combination in the top right corner.

Click the picture for a better look.

• heterozygous seed

• rounded seed

• wrinkled seed

• both wrinkled seed and rounded seed

Imagine that a true breeding alien mother has blue eyes, which are dominant. The true breeding alien

father has yellow eyes, which are recessive. What color are the offspring’s eyes if aliens inherit genes the

same way that pea plants do?

• The offspring has blue eyes because the dominant trait will take over the recessive trait.

• The offspring has yellow eyes because the recessive trait will take over the dominant trait.

• The offspring has green eyes because blue and yellow will mix to make green.

• There is no way to know what color eyes the offspring will have.

Gregor Mendel’s experiments with pea plants shaped much of what is known about ___________, the

scientific study of heredity and variations in organisms.

• chemistry

• biology

• physics

• genetics

Tags

NGSS.MS-LS3-2

NGSS.MS-LS4-4

__________ control traits, such as seed color. Variation in traits, such as yellow or green seeds, is

determined by __________.

• Alleles; genes

• Protein; enzymes

• Tall parents; short parents

• Genes; alleles

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A minimopper is an animal from the imaginary planet Mopper. In minimoppers, orange hair is recessive,

and gold hair is dominant. A baby minimopper was born with orange hair. What alleles did the baby

minimopper receive from each parent?

• one recessive allele from each parent

• one recessive allele and one dominant allele

• one dominant allele from each parent

• There is no way to know which alleles the baby minimopper received.

What is the probability that the offspring of this pea plant cross will have rounded seeds? Round is dominant over wrinkled. Click the picture to get a better look.

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-3

The Punnett square below shows the probability that an offspring will have dimples. What is most likely the

father’s genotype? Click the picture to get a better look.

• DD

• Dd

• dd

• There is no way to tell the father's genotype.

Tags

NGSS.HS-LS3-1

In pea plants, tall stems are dominant to short stems. A pea plant only needs one __________ allele in

order to be a tall pea plant. However, it would need two __________ alleles to be a short pea plant.

• recessive; dominant

• dominant; recessive

• purple; blue

• large; small