9. Identify each of the following statements as TRUE or FALSE (remember to provi

Question

9. Identify each of the following statements as TRUE or FALSE (remember to provide

reasoning to justify your answer).

i. If a pair of loci exhibits significant linkage disequilibrium, those loci must be

physically linked on the same chromosome.

ii. Each of us received half of our mitochondrial DNA from our mom and half

from our dad, but the paternally inherited alleles are always recessive, so the

maternal contribution determines the phenotype.

iii. For populations in which individuals preferentially mate with their close

relatives, there will tend to be an excess of homozygous individuals relative to

the expectations of Hardy-Weinberg equilibrium.

Explanation / Answer

i. False. Linkage disequilibrium talks about the alleles and if the alleles are physically in the same loci, but it does not discuss the position of loci, so it cannot be infered that the loci are physically linked.

ii. False. We receive the entirety of our mitochondrial DNA from our mother, and there is no reason to believe that if inherited paternally, the genes will be recessive.

iii. True, as we see removal of external genes in the mix and the genes present in the family are passed down.

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