RETAKE Genetics Unit TEST

Why do identical twins become less alike as they grow older?

• Because the environment plays a role in influencing

  individuals

• Because the genetic makeup of the individuals changes

• Because the individuals’ cells undergo mitosis

• Because the number of recessive alleles exceeds the number of

  dominant alleles

Tags

NGSS.HS-LS3-2

A parent with Type A blood and a parent with Type O blood have a child. Which of the following is a possible genotype of their offspring?

• I^AI^A

• I^AI^B

• I^Bi

• ii

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Examine the pedigree of a couple who has 4 children: 2 girls and 2 boys. Neither parent has a genetic disease.

What inheritance pattern explains the phenotypes of the grandchildren?

• sex-linked

• dominant

• incomplete dominance

• independent assortment

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A cross is performed between two flowers as shown in the Punnett square.

Assume these flowers follow normal patterns of dominance and recessiveness and that the dominant allele codes for red flowers, and the recessive allele codes for yellow flowers. What should be the phenotypic ratio of the offspring from this cross?

• 4 red : 0 yellow

• 2 red : 2 yellow

• 3 red : 1 yellow

• 1 red: 3 yellow

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS4-3

A cross is performed between two flowers as shown in the Punnett square.

Assume that red (R) is codominant with yellow (r) in flower color. What should be the ratio of the offspring from this cross?

• 1 red : 2 red and yellow stripes : 1 yellow

• 1 red : 2 orange : 1 yellow

• 3 red : 1 yellow

• 1 red : 3 yellow

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS4-3

Examine the pedigree chart to answer the question.

How would Paul use the information from the pedigree?

• to determine how many children he will have

• to determine how many diseases he will get

• to determine the chance that the trait is caused by pollution

• to determine the chance that his children will have the trait

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A wren with gray feathers is mated with a wren of the same phenotype. Among their offspring, 16 babies are gray, 8 are black, and 8 are white.

What is the simplest explanation for the inheritance of these colors in wrens?

• Grey is dominant.

• Black is dominant.

• White is dominant.

• No Color is dominant

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

A homozygous tall pea plant (TT) is crossed with a heterozygous tall pea plant (Tt). Which statement is true about the offspring of this cross?

• All of the offspring will have the same phenotype (short), but two different genotypes (Tt, tt).

• All of the offspring will have the same phenotype (short) and the same genotype (tt).

• All of the offspring will have the same phenotype (tall), but two different genotypes (TT,Tt).

• All of the offspring will have the same phenotype (tall) and the same genotype (Tt).

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A cross is performed between two flowers as shown in the Punnett square.

The R allele codes for red flowers, and the Y allele codes for yellow flowers. If these flowers show an incomplete dominance inheritance pattern, what would be the phenotypic ratio of the offspring of this cross?

• 1 red : 2 red and yellow stripes : 1 yellow

• 1 red : 2 orange : 1 yellow

• 3 red : 1 yellow

• 1 red : 3 yellow

Tags

NGSS.HS-LS3-2

What is the best description of the individual represented by this karyotype?

• a female who has experienced a mutation in which a gene segment was translocated to a new chromosome

• a female who has experienced a deletion mutation of several base pairs from a chromosome

• a male who has experienced a mutation in which extra base pairs were added to a chromosome

• a male who has experienced a nondisjunction mutation of one or more chromosomes

Tags

NGSS.HS-LS3-2