Chapter 10: 10.5 Genetic Linkage Flashcards

1
Q

Genes follow the Law of Independent Assortment when they are located…

A
  1. On different chromosomes
  2. Far apart on the same chromosome
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2
Q

When genes ore located close together on the same chromosomes, they are said to be…

A

Linked

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3
Q

When genes are located very close together, the chance of recombination occurring between them is…

A

Low

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4
Q

What are recombination frequencies used for?

A

Used to determine how close together two genes are on the same chromosome

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5
Q

What is done to determine recombination frequencies?

A

A cross is done using:
1. A fly that is heterozygous for both genes of interest
2. A fly that is homozygous recessive for both genes of interest

The heterozygous individual will therefore completely determine the phenotype of the offspring

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6
Q

What is the formula for calculating recombination frequency?

A

RF = (Recombinants / Total offspring) * 100%

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7
Q

What do linker maps determine?

A

Relative distance and order of genes on a chromosome

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8
Q

What is used to create a linkage map?

A

Use the recombination frequency to determine how close together genes are located on chromosome

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9
Q

What is one percent equal to in a linkage map?

A

One centimorgan

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