Sign up for FREE

Monohybrid Cross Worksheet

Last updated about 5 years ago

27 questions

2

2

2

2

2

5

4

3

3

6

4

4

1

1

8

8

8

8

6

1

1

6

1

2

6

2

2

Question 1

1.

genotypes made of the same alleles

alleles

dominant

heterozygous

homozygous

recessive

Question 2

2.

different forms of genes for a single trait

alleles

dominant

heterozygous

homozygous

recessive

Question 3

3.

gene that is always expressed

alleles

dominant

heterozygous

homozygous

recessive

Question 4

4.

gene that is expressed only in the homozygous state

alleles

dominant

heterozygous

homozygous

recessive

Question 5

5.

genotypes made of two different alleles

alleles

dominant

heterozygous

homozygous

recessive

Question 6

6.

Choose all of the choices that are examples of dominant alleles.

D

e

k

L

N

n

R

S

Question 7

7.

Choose all of the choices that are examples of recessive alleles.

M

n

d

F

G

r

k

P

Question 8

8.

Choose all of the choices that are examples of homozygous dominant.

AA

Gg

KK

mm

uu

Rr

TT

Question 9

9.

Choose all of the choices that are examples of homozygous recessive.

ee

Ff

HH

Oo

qq

Uu

ww

Question 10

10.

Choose all of the choices of genotpyes in which the dominant gene must show up.

AA

Dd

EE

ff

Jj

RR

Ss

Question 11

11.

Choose all of the choices of genotypes in which the recessive gene must show up.

aa

Gg

Ff

KK

rr

Oo

Tt

Question 12

12.

Examine the Punnett squares and choice the ones that are correct.

First one

Second one

Third one

Fourth one

Question 13

13.

What do the letters on the outside of the Punnett square stand for?

the parents alleles

dominant traits

recessive traits

the offsprings alleles

Question 14

14.

What do the letters on the inside of the Punnett square stand for?

the parents alleles

dominant traits

recessive traits

the offsprings alleles

Question 15

15.

Complete the Punnett square and shade all of the homozygous dominant offspring red. Shade all of the heterozygous offspring green. Do not shade any of the homozygous recessive offspring. (Click on the box to edit and then click on the dash at the top to change the color for shading. You can just shade one corner of each box.)

Question 16

16.

Complete the Punnett square and shade all of the homozygous dominant offspring red. Shade all of the heterozygous offspring green. Do not shade any of the homozygous recessive offspring. (Click on the box to edit and then click on the dash at the top to change the color for shading. You can just shade one corner of each box)

Question 17

17.

Complete the Punnett square and shade all of the homozygous dominant offspring red. Shade all of the heterozygous offspring green. Do not shade any of the homozygous recessive offspring. (Click on the box to edit and then click on the dash at the top to change the color for shading. You can just shade one corner of each box)

Question 18

18.

Complete the Punnett square and shade all of the homozygous dominant offspring red. Shade all of the heterozygous offspring green. Do not shade any of the homozygous recessive offspring. (Click on the box to edit and then click on the dash at the top to change the color for shading. You can just shade one corner of each box.)

Question 19

19.

Complete the Punnett square here for #19. Use H instead of S. Short hair, H is dominant over long hair, h.

One parent is Hh and one is hh. Be sure to type the parent alleles outside the box.

Question 20

20.

What percent of the offspring will have short hair? (HH or Hh)

0%

25%

50%

75%

Question 21

21.

What percent of the offspring will have long hair (hh)?

0%

25%

50%

100%

Question 22

22.

Complete the Punnett Square this time for two parents that are heterozygous. Use H for dominant short hair and h for recessive long hair again. Be sure to type the parent alleles outside the box.

Question 23

23.

What percent of the offspring will have short hair?

0%

25%

75%

100%

Question 24

24.

What percent of the offspring will have long hair?

0%

25%

75%

100%

Question 25

25.

Hornless (H) is dominant over horns (h) in cows. A homozygous hornless bull is mated with a homozygous horned cow. Complete the Punnett Square to show the possible offspring. Be sure to type the parent alleles outside the box.

Question 26

26.

What will be the genotypes of all of the offspring?

HH, Hh, Hh, hh

Hh, Hh, Hh, Hh

Hh, Hh, hh, hh

HH, HH, Hh, Hh

Question 27

27.

What will be the phenotypes of all of the offspring?

all of the offspring will have horns. 

all of the offspring will be hornless.

2 of the offspring will be hornless and 2 will have horns. 

3 of the offspring will be hornless and 1 will have horns. 