Non-Mendelian Inheritance

Question 1

explains inheritance resulting in two dominant alleles being expressed in the offspring, with neither trait being masked.

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B: Codominance

Question 2

Explain incomplete dominance, using snapdragon flowers as an example.

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Incomplete dominance is seen in offspring that have a third phenotype not seen in the parents. Snapdragons are an example. The third phenotype results when a snapdragon with the red pigment protein crosses with a snapdragon with a defective gene that produces no pigment, resulting in a white snapdragon. The offspring receive one allele from each parent, resulting in half the amount of pigmentation for red color being expressed. The offspring will be pink snapdragons instead of red or white.

Question 3

A chicken with black feathers (BB) is crossed with a chicken with white feathers (WW). The offspring have black and white feathers.What is the genotype of the offspring?1. 2. ⇒ BW3. ⇒ BW4. ⇒ BW

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BW

Question 4

⇒ Antigens on the blood determine a person’s blood type. ⇒ Antibodies in the blood attack foreign blood not compatible with the antigens on the blood.

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Antibodies

Question 5

Polygenic traits are determined by multiple blood typescells✔ genes received from each parent.

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C: ✔ genes

Question 6

What did you include in your response? Check all that apply.If there are more alleles present for darker skin tone, then the offspring will have darker skin pigment than the parents may have.There can be varying expressions of pigment color from dark to light based on the alleles received, even in the same family.The sum of the allele combinations determines the expression of the trait from one degree to the other.A bell curve shows the quantitative variation.

Revolt · Accepted Answer

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Question 7

explains traits that are neither dominant nor recessive, resulting in a third phenotype in the offspring that appears to blend the traits from the parents.

Revolt · Accepted Answer

A: Incomplete dominance

Question 8

This is incomplete dominance✔ codominance because there are two recessive✔ dominantpolygenic traits.

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B: ✔ codominance

Question 9

Type AType BType AB✔ Type O blood is known as the universal donor, which means it can be given to anyone needing a blood transfusion.Type AType B✔ Type ABType O blood is known as the universal recipient, which means it can receive all blood types during a transfusion.

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C: Type AB; D: ✔ Type O

Question 10

Explain why polygenic traits are expressed through quantitative variation, using skin color as an example.

Revolt · Accepted Answer

If there are more alleles present for darker skin tone, then the offspring will have darker skin pigment than the parents may have. There can be varying expressions of pigment color from dark to light based on the alleles received, even in the same family. The sum of the allele combinations determines the expression of the trait from one degree to the other. A bell curve shows the quantitative variation.

Non-Mendelian Inheritance Answers

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