AP BIOLOGY

EVOLUTION

PATTERNS OF EVOLUTION

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

A genetic mistake was made during meiosis, resulting in offspring with a few different genes than their parents. Of which cause of evolution is this an example?

A	small population
B	mutations
C	natural selection
D	movement (gene flow)
E	nonrandom mating (sexual selection)

Explanation:

Detailed explanation-1: -Mistakes during cell division frequently generate changes in chromosome content, producing aneuploid or polyploid progeny cells. Polyploid cells may then undergo abnormal division to generate aneuploid cells. Chromosome segregation errors may also involve fragments of whole chromosomes.

Detailed explanation-2: -Errors can occur during meiosis producing gametes with an extra or missing chromosome. The consequences of this following fertilisation depend on which chromosomes are affected. Often the embryo is not viable, but some of these errors can lead to trisomy conditions or sex chromosome disorders.

Detailed explanation-3: -Both missense and frameshift mutations may change the alleles causing variations in the trait.

There is 1 question to complete.