GENETICS AND EVOLUTION
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Todd eats meat but his brother is a vegetarian.
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Julie has a scar on her arm, but her sister does not.
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Two siblings have different eye color.
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I am older than my sister.
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Detailed explanation-1: -Solution : Variation in gene frequencies is referred to as genetic variation . Eye colour is determined by variations in genes of a person . Two children having different eye colour is an example of genetic variation .
Detailed explanation-2: -People with blue eyes have one allele of the gene for eye color, whereas people with gray eyes will have a different allele of the gene. This is an example of gene variation.
Detailed explanation-3: -Genetic variation results in different forms, or alleles?, of genes. For example, if we look at eye colour, people with blue eyes have one allele of the gene for eye colour, whereas people with brown eyes will have a different allele of the gene.
Detailed explanation-4: -Eye color is directly related to the amount of melanin in the front layers of the iris. People with brown eyes have a large amount of melanin in the iris, while people with blue eyes have much less of this pigment. A particular region on chromosome 15 plays a major role in eye color.