Chin fissure -- dominant, so expressed in heterozygous and homozygous dominant individuals -- 3/4 (or 75%) possible outcomes will have at least one dominant allele. -------------. 2. Albinism (lack of skin pigmentation) is caused by a recessive autosomal allele.A man and a woman, both normally pigmented, have an albino child. The mother is now pregnant again, and her doctor tells her she is carrying fraternal twins (resulting from two eggs between fertilized by separate sperm).r since one parent only have one possible gamete and the other only has two possible combinations, you can do a smaller punnett's square --. tp. TP. TtPp. Tp. Ttpp. ---------------------------. 5. Black fur in mice is dominant to brown fur (B – dominant allele, b-recessive allele).