30. Hair straightness in humans appears to be governed by incomplete dominance of a pair of alleles. Individuals may have straight, wavy or curly hair. Homozygous dominant individuals have straight hair, homozygous recessive individuals have curly hair. In a randomly mating population of 320 people, there were 41 curly-haired people. If the frequency of a recessive allele changes from 0.0031 to 0.04 after several generations, the most probable reason is that non-random mating is occurring there is no immigration natural selection is not occurring random mating is occurring

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Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.