GENETICS AND EVOLUTION
INHERITANCE AND VARIATION
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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RECESSIVE
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HOMOLOGOUS
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Either A or B
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None of the above
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Detailed explanation-1: -Alleles produce phenotypes (or physical versions of a trait) that are either dominant or recessive. The dominance or recessivity associated with a particular allele is the result of masking, by which a dominant phenotype hides a recessive phenotype.
Detailed explanation-2: -The type of allele that is often hidden or overshadowed by dominant allele is known as a recessive allele.
Detailed explanation-3: -Humans have two versions of all autosomal genes, called alleles, one from each parent. The recessive trait is hidden in the heterozygous individual (Dd) if the other allele is inherited in a dominant fashion, and so this person is a called a “carrier” of the recessive allele, but does not manifest the disease or trait.
Detailed explanation-4: -Each allele may be dominant, recessive, or co-dominant in nature. Dominant alleles are those that mask the effect of the recessive alleles when existing together in a gene. Therefore, the trait that remains hidden or masked is called a recessive trait.
Detailed explanation-5: -Dominant refers to the relationship between two versions of a gene. Individuals receive two versions of each gene, known as alleles, from each parent. If the alleles of a gene are different, one allele will be expressed; it is the dominant gene. The effect of the other allele, called recessive, is masked.