The MMR vaccine protects your child against three viruses: measles, mumps, and rubella (German measles). You can also protect your child against chicken pox with the MMRV vaccine. The MMRV is the same as the MMR, except that it also includes protection against the varicella virus, which causes chicken pox. Some parents get the first dose of the MMR vaccine for their child, and choose the MMRV vaccine for the second dose.
Rating Newest Oldest. Best Answer: Widows peak is caused by a dominant gene, say W. Let's assume the recessive straight hairline gene as w. In your case, your mom's widows peak gene is likely, Ww. Your dad's is ww. You need at least one W to have it expressed, but you need two ww to have straight hairline. Obviously, you inherit the w genes from both your parents, so you have straight hairline.
Autosomal dominant. One mutated copy of the gene in each cell is sufficient for a person to be affected by an autosomal dominant disorder. Each affected person usually has one affected parent (illustration). Autosomal dominant disorders tend to occur in every generation of an affected family.Huntington disease, neurofibromatosis type 1. Autosomal recessive. Two mutated copies of the gene are present in each cell when a person has an autosomal recessive disorder.-linked dominant disorders are caused by mutations in genes on the X chromosome. Females are more frequently affected than males, and the chance of passing on an X-linked dominant disorder differs between men (illustration) and women (illustration).