Vulcans have pointed ears (determined by allele P), absent adrenals (determined by A), and a right-sided heart
(determined by R). All these alleles are dominant to normal Earth alleles: rounded ears (p), present adrenals (a),
and a left-sided heart (r). The three loci are autosomal
and linked as shown in this linkage map:
10 m.u. 25 m.u.
P A R
Mr. Spock, first officer of the starship Enterprise, has a
Vulcan father and an Earthling mother. If Mr. Spock marries an Earth woman and there is no (genetic) interference, what proportion of their children will have
a. Vulcan
b. Earth phenotypes for all three characters?
c. Vulcan ears and heart but Earth adrenals?
d. Vulcan ears but Earth heart and adrenals?
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