The father of Mr. Spock, first officer of the starship Enterprise, came from the

Question

The father of Mr. Spock, first officer of the starship Enterprise, came from the planet Vulcan. Mr. Spock's mother came from Earth. Pure-bred Vulcans like Mr. Spock's father have pointed ears (P), no adrenal glands (A), and a right-sided heart (R) and are homozygous for all of these alleles. These Vulcan alleles are dominant over normal earthling alleles. These three genes are autosomal, and they are linked as shown in this map: 6) P 15 map units 20 map units If Mr. Spock marries a woman from Earth, what is the likelihood (expressed as a percentage or as a decimal) that their children would: a) have Vulcan traits for all three of these characteristics? ppens if the mutation oc

Explanation / Answer

Map distance between the pointed ear and no Adrenal gland is 15 map unit.

So there is maximum 15 % probability that we get the population which has either pointed ear or no adrenal gland.

Map distance between the right-sided heart and no Adrenal gland is 20 map unit.

So there is maximum 20% probability that we get the population which has either right-sided heart or no adrenal gland.

Since there are three genes are involves so the chance of double crossover will be 20*10/100*100 = 3%

So overall there will be 20+15+3 % population which will show crossover. So population which will have all alleles belong to Valcun or form the female from earth will be 100-38 = 62%

Out of 62%, half will be of Vulcan and half will be the female from the earth.

SO overall there will be 31% of the population will have Vulcan alleles

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