EVOLUTION
EVIDENCE FOR EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the number of genes that control the trait.
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which form of the trait is dominant.
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the relative frequencies of the various alleles.
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the relationship of allele frequencies to Mendelian ratios.
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Detailed explanation-1: -The number of phenotypes produced for a given trait depends on how many genes control the trait. Height in humans is an example of a single-gene trait . Each gene of a polygenic trait often has two or more phenotypes . A single polygenic trait often has many possible genotypes .
Detailed explanation-2: -The number of phenotypes for a certain trait is usually influenced by the number of genes that control the trait. It can either be a single-gene trait or a polygenic trait. A single-gene trait refers to a characteristic or a phenotype that is controlled by one gene.
Detailed explanation-3: -An organism’s phenotype is determined by its genotype, which is the set of genes the organism carries, as well as by environmental influences upon these genes.
Detailed explanation-4: -The formula to know the number of possible phenotypes from two parents in a test cross is 2n in which n describes the number of pairs of characters or the number of pair of heterozygous pair of alleles in the genotype of the parent.
Detailed explanation-5: -Diploid organisms inherit two alleles for each gene; one allele from each parent. Interactions between alleles determine an organism’s phenotype. If an organism inherits two of the same alleles for a particular trait, it is homozygous for that trait. Homozygous individuals express one phenotype for a given trait.