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WorksheetsNon-Mendelian Inheritance
Total questions: 30
Worksheet time: 35mins
When a single gene has more than 2 versions (like blood type)
polygenic inheritance
multiple alleles
codominance
linked genes
When several genes control one phenotype
polygenic inheritance
multiple alleles
codominance
linked genes
A red flowering plant is crossed with a blue flowering plant. The offspring are all purple. The inheritance pattern is:
codominance
complete dominance (Mendelian)
incomplete dominance
multiple alleles
polygenic inheritance
A red flowering plant is crossed with a yellow flowering plant. The offspring are all red with yellow edges. The inheritance pattern is:
codominance
complete dominance (Mendelian)
incomplete dominance
multiple alleles
polygenic inheritance
Cross a man with AB blood and a woman with O blood. What are the possible phenotypes of the offspring?
A or O
A or B
B or O
A, B or O
A red flowered plant (R) breeds with a White flowered plant (r). The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have pink (Rr) flowers?
Snap dragon color is a incomplete dominant trait.
A red flower (RR) is crossed with yellow flower (rr)?
What color are flowers that are Rr?
Red and Yellow
Yellow
Orange
A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?
Codominance
What type of inheritance is shown where the offspring shows both traits?
In mice, the homozygous mice are black or white. The heterozygous mice are gray.
What pattern of inheritance is expressed in fur color in mice?
Some flowers are controlled by codominance. Red flowers (RR), blue flowers (BB) and Speckled flowers (RB).
Cross a red flower with a speckled flower.
What is the phenotypic ratio?
2 red, 2 speckled
2 red, 2 blue
2 blue, 2 speckled
In some carnations, flower color exhibits codominance. Identify the correct genotypes for red, white, and speckled carnations.
Red = RR, white = rr, speckled = SS
Red = RR, white = WW, speckled = SS
Red = RR, white = RW, Speckled = WW
Red = RR, white = WW, speckled = RW
In Andalusian fowls, black individuals (BB) and white individuals (WW) are homozygous. Heterozygous individuals are grey (BW).
What is the genotype ratio for a cross between a grey fowl and a white fowl?
2 BB: 2 BW: 0 WW
0 BB: 4 BW: 0 WW
0 BB: 2 BW: 2 WW
1 BB: 2 BW: 1 WW
In humans, the gene for curly hair (H) is incompletely dominant to the gene for straight hair (h). Individuals that are heterozygous (Hh) have wavy hair.
Two wavy-haired heterozygous parents have a child.
What is the likeliness that the child will have wavy hair?
1/4
1/2
3/4
4/4
A woman is heterozygous for blood type A and a male is homozygous for blood type B.
What blood types are possible in their children?
A, B, AB, and O
A, B, and AB
AB and B
Just B
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
Cross a homozygous blood type A parent with a homozygous blood type B parent.
What percent of the offspring will be type A blood?
0%
25%
50%
100%
Cross a heterozygous blood type B parent with a blood type O parent.
What percent of the offspring will be type B blood?
0%
25%
50%
100%
Cross a heterozygous blood type B parent with a blood type O parent.
What percent of the offspring will be type O blood?
0%
25%
50%
100%
Cross a parent with AB blood type with a blood type O parent.
What percent of the offspring will be type B blood?
0%
25%
50%
100%
Cross a parent with AB blood type with a homozygous A blood type parent.
What percent of the offspring will be type A blood?
0%
25%
50%
100%
Maria is studying blood types in her biology class. She found out she is type O while her mom is type A, and her dad is type B. She is worried that she may have been switched as a baby in the hospital since they can’t be her parents.
Is she correct in her thinking that her parents couldn't have had a type O baby?
Hint: Work backwards. Fill in punnett squares with O blood type.
Look at the Type A & Type B genotypes with O alleles.
Yes, she's correct. A type A and type B parent could not have had a type O child.
No. Her parents could be AO and BO and have a 25% chance to have a baby with blood type O.
No. Her parents could be AO and BO and have a 50% chance to have a baby with blood type O.
No. Her parents could be AO and BO and have a 100% chance to have a baby with blood type O.
Some flowers are controlled by codominance. Red flowers (RR), blue flowers (BB) and Speckled flowers (RB).
Cross two speckled flowers.
1 red, 2 speckled, 1 blue
2 red, 2 blue
2 blue, 2 speckled
1 red, 1 speckled, 2 blue
If flowers have the following phenotypes and genotypes, what is the phenotypic ratio of crossing a blue flower and a purple flower?
Blue = BB
Red = RR
Purple = BR
2:2
Blue : Purple
2:2
Red : Blue
3:1
Purple : Blue
4:0
Blue: Purple
