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.
When Mendel crossed homozygous tall plants with homozygous short plants, all the peas from these plants produced tall pea plants in the next generation Dominant Trait would be represented as capital I and the recessive trait would be lower case i.