Of 31 children born of father-daughter matings, 6 died ininfancy, 12 were abnormal and died in childhood, and 13 werenormal. From this information calculate roughly how many recessivelethal genes we have, on average, in the human genome. (Hint: ifthe answer were 1, then the daughter would stand a 50% chance ofcarrying the lethal allele, and the probability of the union’sproducing a lethal combination would be 1/2 * 1/4 = 1/8. So, 1 isnot the answer.) Discuss the possibility of undetected fatalitiesin utero in such matings. How would they affect your result?
