Acouple planning their family are aware that through the past three generations on the husband's side a substantial number of stillbirths have occurred and several malformed babies were born who died early in childhood. the wife has studied genetics and urges her husband to visit a genetic counseling clinic, where a complete karyotype-banding analysis is performed. although the tests show that he has a normal complement of 46 chromosomes, banding analysis reveals that one member of the chromosome 1 pair (in group a) contains an inversion covering 70 percent of its length. the homolog of chromosome 1 and all other chromosomes show the normal banding sequence. part a how would you explain the high incidence of past stillbirths?