GENETICS AND EVOLUTION
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Both alleles come from the mother
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Both alleles come from the father
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One allele comes from the mother and one allele comes from the father
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None of the above
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Detailed explanation-1: -Which statement concerning a pair of alleles for a gene controlling a single characteristic in humans is true? Both genes come from the father.
Detailed explanation-2: -Genes come in different varieties, called alleles. Somatic cells contain two alleles for every gene, with one allele provided by each parent of an organism.
Detailed explanation-3: -Those instances are referred to as “multiple allelism” where different forms of the same gene exist within the population. These three or more variants for the same gene are called multiple alleles.
Detailed explanation-4: -Answer and Explanation: An organism with two of the same alleles for a specific trait is homozygous.
Detailed explanation-5: -If expression of a trait requires only one copy of a gene (one allele), that trait is considered dominant. If expression of a trait requires 2 copies of a gene (2 alleles), that trait is considered recessive. One exception is X-linked disorders.