Free Printable Yr 10 - Genetics

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Yr 10 - Genetics - Punnett Squares

Total questions: 42

Worksheet time: 54mins

Name

Class

Date

A red flowered plant (RR) is crossed with a white flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have pink (RW) flowers?

25%

50%

100%

What type of inheritance do two alleles have if their traits blend together?

Incomplete Dominance

Co-Dominance

This is an example of ___________?

Incomplete dominance

Co-Dominance

This is an example of ___________.

Incomplete Dominance

Codominance

A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?

Incomplete Dominance

Co dominance

This is an example of ___________.

Incomplete Dominance

Codominance

A tall plant (TT) is crossed with a short plant (SS) and a medium plant (TS) results. This is what type of inheritance pattern?

Incomplete Dominance

Codominance

In cats, long hair is recessive to short hair. A true-breeding (homozygous) short haired male is mated with a long-haired heterozygous female. What will their offspring look like? You may choose more than one answer.

50% long haired

50% short haired

100% short haired

100% long haired

The hair form gene shows incomplete dominance. Straight hair is dominant, curly hair recessive, and wavy hair is heterozygous. Mr. and Mrs. Anderson both have wavy hair. What are the phenotypic possibilities for their children? You may chose more than one answer.

25% curly

100% wavy

25% straight

50% wavy

10.

Mr. and Mrs. Canady have 8 children. Three of them have attached earlobes (recessive) like their father, and the other five have free earlobes like their mother. What are the genotypes of Mr. and Mrs. Canady? You may select more than one answer.

Mr. Canady: Aa

Mr. Canady: aa

Mrs. Canady: Aa

Mrs. Canady: AA

They are both AA

11.

condition in which both alleles for a gene are expressed when present - both traits are visible

Codominance

Dominance

Complete dominance

Incomplete dominance

12.

when one allele is not completely dominant over the other - blending of two traits

Codominance

Complete dominance

incomplete dominance

none of these

13.

this image is an example of

codominance

dominance

incomplete dominance

14.

This type of inheritance pattern shows BOTH traits in possible offspring

complete dominance

incomplete dominance

co-dominance

dominant pattern

15.

In some carnations, flower color exhibits codominance. When crosses, Red (R) and white (W) flowers make speckled flowers (RW) that show both colors.
Complete a cross between A speckled flower and a red flower. Find the phenotype ratio.

2 red: 2 speckled: 0 white

4 red: 0 speckled: 0 white

0 red: 4 speckled: 0 white

0 red: 2 speckled: 2 white

16.

Snap dragon color is a incomplete dominant trait. A red flower (RR) is crossed with white flower (WW)? What color are flowers that are RW?

Red

Red and White

White

Pink

17.

In Andalusian fowls, black individuals (BB) and white individuals (bb) are homozygous. Heterozygous individuals are grey (Bb).
Cross a black fowl with a white fowl. What is the phenotype ratio?

4 black: 0 grey: 0 white

2 black: 2 grey: 0 white

0 black: 4 grey: 0 white

0 black: 2 grey: 2 white

18.

In some carnations, flower color exhibits codominance. Identify the correct genotypes for red, white, and speckled carnations.

Red = RR, white = rr, speckled = Rr

Red = RR, white = WW, speckled = rw

Red = RR, white = ww, Speckled = Rw

Red = RR, white = WW, speckled = RW

19.

Dominant alleles are represented by a:

Male gene

lowercase letter

recessive trait

capital letter

20.

What are the possible genotypes for this cross?

TT = 25% Tt= 50% tt=25%

all tall

TT= 75% tt = 25%

Tt = 100%

21.

A man that is homozygous for type A blood (I^AI^A) has children with a woman that is heterozygous for type B blood (I^Bi). What fraction of offspring will have type AB blood?

1/8

1/4

1/2

3/4

22.

A man that is homozygous for type A blood (I^AI^A) has children with a woman that is heterozygous for type B blood (I^Bi). What percentage of offspring will have type A blood?

25%

50%

75%

100%

23.

A woman with type AB blood marries a man with type O blood and they have several children. What fraction of offspring will have type A blood?

1/4

2/4

1/2

3/4

24.

A plant with red flowers (RR) is crossed with a plant that has white flowers (rr). What percentage of the offspring will have pink flowers?

25%

50%

75%

100%

25.

A dark brown horse (DD) is mated with a palomino horse (Dd) to produce offspring. What percentage of the offspring from this mating would be expected to be palomino horses?

25%

50%

75%

100%

26.

A male palomino horse is mated with a female palomino horse. What is the probability that the offspring they produce will also be palomino?

1/4

1/2

3/4

1/8

27.

if red hair (R) and white hair (W) are codominant, what is the phenotype of a bunny with genotype RW

pink fur

red and white fur

red fur

white fur

28.

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

29.

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

X^HX^h

X^hX^h

X^HY

X^hY

31.

Colorblindness is a recessive x-linked disorder.
Which genotype represents a male with normal vision?

X^NX^N

XⁿXⁿ

X^NY

XⁿY

31.

Colorblindness is a recessive x-linked disorder.
Which genotype represents a male with normal vision?

X^NX^N

XⁿXⁿ

X^NY

XⁿY

32.

Colorblindness is a recessive x-linked disorder.
Which genotype represents a female who is colorblind?

X^NXⁿ

XⁿXⁿ

X^NX^N

XⁿY

33.

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

X^BX^b

X^bX^b

X^bY

X^BY

34.

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

X^BX^b

X^bX^b

X^BX^B

X^bY

35.

In fruit flies, red eye color (R) is a sex-linked trait that is dominant over white eye color (r).
According to the Punnett square, what percentage of female offspring will have red eyes?

25%

50%

100%

36.

Duchenne muscular dystrophy is a recessive x-linked disorder.
According to the Punnett square, what percentage of male offspring will have the disorder?

25%

50%

100%

37.

Heterozygous is when...

the alleles are the same

the alleles are different

the alleles are absent

the alleles are present

38.

Aa is

homozygous

heterozygous

39.

Dominant alleles are represented by a:

Male gene

lowercase letter

recessive trait

capital letter

40.

Which of the following genotypes is homozygous dominant?

41.

What gender has an X and a Y chromosome?

male

female

transgender

all of the above

42.

If a baby was born with green eyes, but his mother had blue eyes, is it possible that the baby's father had blue eyes? (Blue is dominant)

Yes

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Yr 10 - Genetics - Punnett Squares

Total questions: 42

Worksheet time: 54mins

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