Multiple Choice
Who determined that genes specify enzymes?
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3. Extensions to Mendelian Inheritance
Overview of interacting Genes
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How do gene families typically arise in the genome?
A
By the fusion of unrelated genes from different species
B
Through random loss of genetic material
C
Through gene duplication followed by divergence
D
Via direct inheritance of identical genes from both parents
Verified step by step guidance1
Understand that gene families are groups of related genes that share a common ancestor and often have similar sequences and functions.
Recognize that gene families typically arise through a process called gene duplication, where a gene is copied within the genome.
After duplication, the gene copies can accumulate mutations independently, leading to divergence in their sequences and potentially their functions.
This divergence allows the duplicated genes to evolve new or specialized roles while retaining some similarity to the original gene.
Therefore, the formation of gene families is best explained by gene duplication followed by divergence, rather than fusion of unrelated genes, random loss, or direct inheritance of identical genes.
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