Other Inheritance Patterns Flashcards

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1
Q

Incomplete Dominance

A

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

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2
Q

Codominance

A

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

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3
Q

Multiple alleles

A

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

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4
Q

Blood Types

A

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

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5
Q

Polygenic Inheritance

A

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

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6
Q

Sex-Linked traits

A

traits determined by genes on the sex chromosomes

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7
Q

Polygenic Traits can be identified by

A

a variety of phenotypes

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8
Q

Variability results in a what curve?

A

bell-shaped

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9
Q

Examples of polygenic traits

A

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

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10
Q

Characteristics/traits can be controlled by…

A

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

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11
Q

A polygenic trait involves what kind of alleles?

A

active and inactive

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12
Q

Sex-linked traits

A

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

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13
Q

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

A

the male offspring inherits the trait

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