Other Inheritance Patterns

Question 1

Incomplete Dominance

Answer 1

when the alleles of a gene aren’t dominant nor recessive to another. the phenotype is a mix/fusion of the two distinctive phenotypes

Question 2

Codominance

Answer 2

when the alleles of a gene both express themselves when they both show up in the genotype

Question 3

Multiple alleles

Answer 3

a single gene controlled by three or more alleles
ex) blood types

Question 4

Blood Types

Answer 4

one gene with multiple alleles code for blood types: I^A, I^B, and i. where I^A and I^B codominant

Question 5

Polygenic Inheritance

Answer 5

a single characteristic controlled by 2 or more genes with 2 alleles each
ex) the more active alleles, the taller someone is

Question 6

Sex-Linked traits

Answer 6

traits determined by genes on the sex chromosomes

Question 7

Polygenic Traits can be identified by

Answer 7

a variety of phenotypes

Question 8

Variability results in a what curve?

Answer 8

bell-shaped

Question 9

Examples of polygenic traits

Answer 9

skin, hair, eye color, foot size, nose length, height, Rh blood factor

Question 10

Characteristics/traits can be controlled by…

Answer 10

one gene w/ 2 alleles, one gene w/ multiple alleles, multiple genes each having 2 alleles, and sometimes environment

Question 11

A polygenic trait involves what kind of alleles?

Answer 11

active and inactive

Question 12

Sex-linked traits

Answer 12

traits controlled by genes that lie on a sex chromosome (X or Y)

Question 13

What happens when a female has a sex-linked recessive trait and passes it down to offspring? What is the male offspring?

Answer 13

the male offspring inherits the trait