Autosomal Linkage (AQA A-Level Biology): Quizzes

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Autosomal Linkage
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What is autosomal linkage?

Genes on the same autosome

How many autosomes do humans have that can show autosomal linkage?

22

How do linked genes pass into gametes during meiosis?

As a unit together

Why don't linked genes follow Mendel's Law of Independent Assortment?

They're physically connected on same chr.

How many gamete types do linked genes produce (assuming no crossing over)?

2

In the fruit fly cross GgNn × GgNn with linkage, what is the expected phenotypic ratio?

3:1

In fruit flies, which allele causes grey body colour?

G (dominant)

What does autosomal linkage explain about inheritance?

Why characteristics inherit together

What effect does gene distance have on linkage strength?

Closer genes are more tightly linked

What term describes all genes on a single chromosome?

Linkage group

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