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Origin of Genes: Gene Duplication Causes

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Origin of Genes: Gene Duplication Causes

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Questions and Answers

What causes gene duplication?

Replication slippage

Random mutation

Retrotransposition

Unequal crossing over (correct)

Which process involves DNA polymerase losing its place and copying a segment of chromosomes twice?

Exon shuffling

Recombination

Replication slippage (correct)

Horizontal gene transfer

What is the result of retrotransposition?

Reverse transcription of introns

Integration into the genome (correct)

Deletion of genetic material

Formation of new genes

What is the main difference between duplicated genes and their parental copies?

They lack introns Signup and view all the answers

Which process leads to the mixing of genes within the same species?

Recombination Signup and view all the answers

What does horizontal gene transfer involve?

Movement of genetic material between non-interbreeding organisms Signup and view all the answers

What is the primary reason that new genes, de novo genes, often get lost in a population?

High mutation rate leading to loss of gene function Signup and view all the answers

What is the outcome when a gene duplicates through retrotransposition?

Loss of introns Signup and view all the answers

In gene families, what happens to paralogs as a result of neofunctionalization?

Gain of new biological functions Signup and view all the answers

How does gene conversion contribute to genetic variation?

Introduces mutations from one locus to another Signup and view all the answers

What is a characteristic feature of pseudogenes in terms of evolution?

Rapidly evolving than parental genes Signup and view all the answers

Which trend describes how DNA bases evolve within protein-coding genes?

Slower evolution at least fitness-affecting bases Signup and view all the answers