GENETICS AND EVOLUTION
GENETIC BASIS OF INHERITANCE
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The trait is recessive.
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The trait is dominant.
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The trait has been amplified.
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The trait is extinct.
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Detailed explanation-1: -Recessive traits like red hair can skip generations because they can hide out in a carrier behind a dominant trait. The recessive trait needs another carrier and a bit of luck to be seen. This means that it can sometimes take a few generations to finally make its presence known.
Detailed explanation-2: -One trick for identifying a recessive trait is that if a trait skips a generation in a pedigree, it is often an autosomal recessive trait (although a trait can be autosomal recessive and not skip generations). These traits appear with equal frequency in both sexes.
Detailed explanation-3: -Determine whether the trait is dominant or recessive. If the trait is dominant, one of the parents must have the trait. Dominant traits will not skip a generation. If the trait is recessive, neither parent is required to have the trait since they can be heterozygous.
Detailed explanation-4: -Terms in this set (5) Recessive traits disappear because 2 recessive alleles are needed to produce the recessive phenotype. They can skip generations and can reappear if an individual inherits 2 copies of recessive gene.