INCOMPLETE DOMINANCE EXAM QUESTIONS

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INCOMPLETE DOMINANCE EXAM QUESTIONS

Qs and Ans Expert- Explanation

This Exam contains:

-Guarantee passing score -8 Questions and Answers -format set of multiple-choice -Expert- Explanation Question 1: What is the molecular basis behind complete and incomplete dominance?

Answer:

Dominant allele (gene) encodes for a protein that leads to a prevalent phenotype. Recessive allele (gene) have been altered in such a way that they no longer encode for the protein. This is true of many (but not all) dominant alleles in a complete dominance relationship

Question 2: Incomplete dominance

Answer:

Neither allele is dominant, so phenotype is intermediate. (Ex: Skin color, height, voice pitch, hand size, hair texture)

Question 3: Norm of reaction

Answer:

phenotypic range that individuals with a particular genotype exhibit under differing environmental conditions

Question 4: Multiple alleles

Answer:

Many genes have three or more variants, but two will be inherited in diploid individuals

Question 5: Polymorphic

Answer:

Different combinations of alleles produce more than 2 phenotypes

Question 6: Codominance

Answer:

Heterozygotes have phenotypes of both inherited alleles. Each allele contributes to produce a multi-part phenotype. Typically involving structural proteins; both types expressed by single cell

Question 7: Incomplete dominance Note

Answer:

Note alleles for traits that lead to incomplete dominance are designated differently. There is no dominant, capital C, or recessive, lower case

• Rather, the trait is designated C and then superscripts are used to differentiate the trait (R for red, W

for white).

Question 8: Environmental effects

on phenotype

Answer:

In addition to genes, phenotypes are controlled by interplay with environment. Genes provide blueprint, environment provide nutrients and proper conditions so that plan can be executed