D3.2 Inheritance HL Flashcards

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1
Q

What is independent assortment?

A

The random segregation of gene alleles during gamete formation

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2
Q

Define a dihybrid cross

A

A genetic cross involving two unlinked genes

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3
Q

What is Mendel’s second law?

A

Law of Independent Assortment

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4
Q

What is the expected phenotypic ratio in a dihybrid cross of unlinked genes?

A

9:3:3:1

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5
Q

What are Punnett grids used for?

A

To predict outcomes of genetic crosses

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6
Q

Why don’t linked genes assort independently?

A

Because they are located close together on the same chromosome

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7
Q

What is crossing over?

A

The exchange of genetic material between non-sister chromatids during meiosis

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8
Q

What is a chi-squared test used for in genetics?

A

To determine the statistical significance of observed vs. expected data in genetic crosses

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9
Q

What is a genetic locus?

A

The specific location of a gene on a chromosome.

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10
Q

Give an example of a genetic disease tested through genetic counseling.

A

Huntington’s disease

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