Monohybrid Cross Worksheet
By Heather E. Fussell
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Last updated almost 4 years ago
27 Questions
2
1.
genotypes made of the same alleles
genotypes made of the same alleles
2
2.
different forms of genes for a single trait
different forms of genes for a single trait
2
3.
gene that is always expressed
gene that is always expressed
2
4.
gene that is expressed only in the homozygous state
gene that is expressed only in the homozygous state
2
5.
genotypes made of two different alleles
genotypes made of two different alleles
5
6.
Choose all of the choices that are examples of dominant alleles.
Choose all of the choices that are examples of dominant alleles.
4
7.
Choose all of the choices that are examples of recessive alleles.
Choose all of the choices that are examples of recessive alleles.
3
8.
Choose all of the choices that are examples of homozygous dominant.
Choose all of the choices that are examples of homozygous dominant.
3
9.
Choose all of the choices that are examples of homozygous recessive.
Choose all of the choices that are examples of homozygous recessive.
6
10.
Choose all of the choices of genotpyes in which the dominant gene must show up.
Choose all of the choices of genotpyes in which the dominant gene must show up.
4
11.
Choose all of the choices of genotypes in which the recessive gene must show up.
Choose all of the choices of genotypes in which the recessive gene must show up.
4
12.
Examine the Punnett squares and choice the ones that are correct.
Examine the Punnett squares and choice the ones that are correct.
1
13.
What do the letters on the outside of the Punnett square stand for?
What do the letters on the outside of the Punnett square stand for?
1
14.
What do the letters on the inside of the Punnett square stand for?
What do the letters on the inside of the Punnett square stand for?
8
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.)
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.)
8
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)
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)
8
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)
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)
8
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.)
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.)
6
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.
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.
1
20.
What percent of the offspring will have short hair? (HH or Hh)
What percent of the offspring will have short hair? (HH or Hh)
1
21.
What percent of the offspring will have long hair (hh)?
What percent of the offspring will have long hair (hh)?
6
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.
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.
1
23.
What percent of the offspring will have short hair?
What percent of the offspring will have short hair?
2
24.
What percent of the offspring will have long hair?
What percent of the offspring will have long hair?
6
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.
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.
2
26.
What will be the genotypes of all of the offspring?
What will be the genotypes of all of the offspring?
2
27.
What will be the phenotypes of all of the offspring?
What will be the phenotypes of all of the offspring?