Unit 9 Flashcards

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1
Q

What is intermediate pattern

A

When the heterozygous genotype is a homogenous blend of the two phenotypes

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2
Q

What is codominance

A

When there is no dominant allele, the heterozygous genotype shows both phenotypes

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3
Q

What is multiple allele

A

There are more than 2 alleles in the gene pool for one trait

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4
Q

What is polygenic traits

A

Two or more genes control one trait

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5
Q

What is pleiotropy

A

One gene controls many traits

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6
Q

What is epistasis

A

Two genes are involved where the one controls the expression of the other

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7
Q

What does autosomal mean

A

Its not sex-linked

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8
Q

What are two characteristics of polygenic inheritance

A

The traits show continuous variation and are referred to as quantitative traits

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9
Q

What is the epistasis in Labrador retreivers

A

-gene 1 determines if pigment can be made, has two alleles where pigment deposition is dominant
-gene 2 determines color, where black is dominant over brown

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10
Q

What ratio does epistasis create

A

A 9:3:4 ratio

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11
Q

What is the environmental effect on phenotypes

A

Some alleles only allow pigment under a certain temperature, ex: himalayen cats

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