2.2.3 An Inheritance Story Answer Key

Question: inherited

Answer: Genes are ___, passed from one generation to the next.

Question: What are some traits that are inherited by our parents?

Answer: height, hair color, metabolism, sex, etc.

Question: What is genotype? What is an example of a genotype?

Answer: -All or part of the genetic constitution of an individual or group

-Bb

Question: What is phenotype? What is an example of a phenotype?

Answer: -The physical and physiological traits of an organism that are determined by the organism’s genetic makeup.

-blue eyes

Question: -mother

-father

Answer: For every gene, we have two copies in each of our cells: one we inherited from our biological ___ and one we inherited from our biological ___.

Question: What are alleles?

Answer: Any of the alternative forms of a gene that may occur at the same place on a chromosome

Question: alleles

Answer: The differences we see in individuals, different skin tones, dimples, eye colors, and more, are a result of different ___ for the genes responsible for those traits.

Question: What is a dominant gene? How is it represented?

Answer: -A genetic trait is considered dominant if the associated phenotype is seen in an individual who has only one copy of the gene associated with the trait.

-capital letter

Question: What is a recessive gene? How is it represented?

Answer: -A trait that is evident only when an organism inherits two copies of a recessive allele for a specific gene.

-lowercase letter

Question: In the neurofibromin gene is the functional or dysfunctional gene dominant?

Answer: dysfunctional