If an allele must be present on both the matermal and paternal chromosomes to affect the phenotype, the allele is said to be
a. dominant
b. recessive
c. complementary
d. heterozygous

the correct answer is B

Explanation:

If there is a dominant allele, it will conceal the presence of the recessive, therefore, the two parents will need to present the recessive alleles, so that there is the possibility of expressing themselves in the offspring.

take him to the hospital or close it up with stitches.

explanation:

because he needs . im 12 i dont know srry if wrong

answer: the answer is d.

explanation: this is because when you exercise you make your muscle produce a certain liquid, that does not evaporate it.   also when you exercise you do not reduce muscle fiber.   and it does not really control your twitch that much.