Free Printable Genetics: Patterns of Inheritance Punnett Square Practice

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Genetics: Patterns of Inheritance Punnett Square Practice

Total questions: 34

Worksheet time: 29mins

Name

Class

Date

A green pea plant (Gg) is crossed with a yellow pea plant (gg). Describe the genotype of the offspring. (Be sure to remember that the capital letter is dominant).

50% heterozygous and 25% homozygous recessive

50% heterozygous and 50% homozygous recessive

100% homozygous recessive

25% heterozygous and 50% homozygous

A tall plant (TT) is crossed with a tall plant (Tt). What is the phenotype of the offspring?

50% homozygous dominant; 50% heterozygous; 100% tall

100% homozygous dominant; 100% tall

25% homozygous dominant; 75% heterozygous; 100% short

50% homozygous dominant; 50% heterozygous; 100% short

A tall plant (Tt) is crossed with a short plant (tt). What is the genotype of the offspring?

25% heterozygous; 75% homozygous

100% homozygous dominant

100% heterozygous

50% heterozygous; 50% homozygous recessive

What is a GENOTYPE?

the genetic make-up of an organism

the physical trait of an organism

mitosis

meiosis

Which of the following are GENOTYPES? (select all correct answers)

black hair

homozygous dominant

heterozygous

blue eyes

PHENOTYPE is

the genetic make-up of an organism

the physical trait of an organism

nucleic acid

Which of the following are PHENOTYPES?

green skin

homozygous recessive

purple eyes

black fur

Which of the following represents alleles for the homozygous recessive genotype?

Which of the following represents alleles for the homozygous dominant genotype?

10.

Which of the following represents alleles for the heterozygous genotype?

11.

What gamete possibilities could come from this parent's genotype?

AB, AB, aB, aB

Ab, AB, Ab, ab

Ab, Ab, Ab, Ab

AB, aB, ab, aB

12.

What goes in box 1

AABb

AABB

aabb

AaBb

13.

What genotype is missing from this Punnett Square?

RrYy

RRYY

rryy

RrYY

14.

Based off this punnett square, what fraction of the offspring will have wrinkled, yellow seeds?

9/16

3/16

1/16

16/16

15.

A dihybrid cross shows the possible outcomes of _______

two alleles

two parents

two traits/characters

a self pollination

16.

(Grey fur (G) is dominant over white fur (g) and Black eyes (B) are dominant over red eyes(b))

A male rabbit GGbb crossed with a female rabbit with ggBb.

How many out of 16, have grey fur and black eyes?

17.

____________ occurs when the dominant and recessive traits are blended in the heterozygous genotype.

Codominance

Punnett squares

Complete dominance

Incomplete dominance

18.

Which of the following are genotypes for blood type B?

I^A I^Aand I^A I^B

I^B I^Band ii

I^B I^Band I^B i

I^A I^Band I^A I^B

19.

___________ is when both the dominant trait and recessive trait are seen in the phenotype.

Codominance

Punnett squares

Complete dominance

Incomplete dominance

20.

Which of the following is true about blood type O?

It contains antigen A only.

It contains antigen B only.

It contains both antigen A and antigen B.

It doesn’t contain antigen A or antigen B.

21.

In the image above, what is the percentage of the offspring has the possibility of inheriting blood type O?

25%

50%

100%

22.

Which of the following refers to a complete dominant cross?

One allele completely dominates over the other.

The two alleles are equally seen in the heterozygous genotype.

The two alleles are blended in the heterozygous genotype.

Neither allele is seen in the phenotypes.

23.

In the image above, the trait for flower color is controlled by codominance. R codes for red flowers and W codes for white flowers. Which of the following correctly reports the phenotypes?

100% red flowers

50% white flowers and 50% pink flowers

50% red flowers and 50% red and white flowers

50% white flowers and 50% red flowers

24.

The image above shows the incomplete dominant cross where B codes for red flowers and b codes for white flowers. What are the phenotypes of the parents?

a red flower and a white flower

a red flower and a pink flower

a white flower and a pink flower

two red flowers

25.

Colorblindness is a sex-linked recessive disorder. A normal woman whose father was colorblind marries a man with normal color vision. What percentage of their sons will be colorblind?

25%

50%

100%

26.

Hemophilia is a sex-linked recessive disorder. A woman with hemophilia marries an unaffected man whose father had hemophilia. What percentage of their daughters will have hemophilia?

25%

50%

100%

27.

Colorblindness is a sex-linked recessive disorder. If the daughter of a couple is colorblind, what are the two possible genotypes of her mother?

X^AX^A and X^AX^a

X^AX^A and X^aX^a

X^AX^a and X^aX^a

Cannot be determined

28.

If a trait shows up more commonly in men than women it is probably

not inherited

on the x chromosome and dominant

on the x chromosome and recessive

on a normal body chromosome

29.

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

50%

100%

25%

30.

Hemophilia is a recessive x-linked disorder.
Which genotype represents a female who is a carrier for hemophilia?

X^HX^h

X^hX^h

X^HX^H

X^hY

31.

Hemophilia is a recessive x-linked disorder.
Which genotype represents a male with hemophilia?

X^HX^h

X^hX^h

X^HY

X^hY

32.

Which of the following genotypes belongs in the red box in the Punnett square?

X^BX^b

X^bX^b

X^bY

X^BY

33.

Vitamin D resistant rickets (deformed bone formation) is a sex-linked DOMINANT trait. According to the Punnett square, what percentage of female offspring will have the disorder?

25%

50%

100%

34.

Hemophilia is an x-linked recessive disorder.

H= normal blood clotting

h=hemophilia

X^HX^h x X^HY

What is the probability that any of their offspring will have hemophilia?

4/4

3/4

2/4

1/4

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Genetics: Patterns of Inheritance Punnett Square Practice

Total questions: 34

Worksheet time: 29mins

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