Topic 8 Flashcards

1
Q

Explain why in areas with low populations of orangutans, many of the orangutans have
deformities and health problems.

A

Genetic bottleneck Genetic diversity is lowered, increasing recessive allele frequency in both parents.

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2
Q

Pure breeding

A

homozygous for both alleles eg AABB or aabb

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3
Q

Explain the difference between the expected ratio and the number shown in the table.

A

Genes BR and br are linked and are carried on the same chromosome, like BbRr. Other phenotypes like Bbrr, BBrr (black smooth) and white rough (bbRr or bbRR) have come about through crossing over and recombination.

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4
Q

codominant alleles

A

Both alleles are expressed / shown (in the phenotype).

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