Non-Mendelian and X-linked traits Flashcards

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1
Q

What is complete dominance?

A

It is when an allele completely masks the other.

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2
Q

What type of dominance produces an intermediate phenotype?

A

Incomplete Dominance

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3
Q

What is Codominance?

A

When both alleles are expressed.

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4
Q

Complete dominance is an example of Mendelian Genetics.

A

True

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5
Q

Bloodtype is an example of what type of dominance?

A

Codominance

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6
Q

The blood type “O” recessive or dominant?

A

recessive

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7
Q

How many pairs of chromosomes do we have?

A

23

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8
Q

Why are men more affected by x-linked diseases?

A

Because they only have 1 copy of the X chromosome.

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9
Q

The combination of “XX” chromosomes means that the person is ________.

A

Female

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10
Q

Can males be a carrier of x-linked diseases?

A

No.

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11
Q

Only women can be carriers of x-linked diseases. Why?

A

Because they have 2 copies of the x-chromosome.

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12
Q

Why does incest more likely to lower survival in humans?

A

a smaller gene pool, lack of variation

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13
Q

What is epistasis?

A

it is when a gene has the ability to surppress the expression of another gene.

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14
Q

Height is one example of a ________.

A

polygenic trait

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15
Q

albinism is an example of __________

A

epistasis

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16
Q

In epistasis, the genotype of a girl’s skin color is ‘bbee’. What is the girl’s hair color?

A

blonde. She has albinism.