True/False

Please answer all questions

1		The physical appearance of the individual is called the phenotype. (p. 404)
			A)	True
			B)	False
2		A recessive allele must be received by both parents to bring about a recessive phenotype. (p. 404)
			A)	True
			B)	False
3		Each child has a 50% chance of having a recessive phenotype if one parent is heterozygous and the other is pure recessive. (p. 406)
			A)	True
			B)	False
4		Tay-Sachs disease is of high incidence among Jewish people in the United States. (p. 407)
			A)	True
			B)	False
5		Individuals with PKU lack an enzyme for the metabolism of phenylalanine. (p. 407)
			A)	True
			B)	False
6		Individuals with PKU must be on a diet throughout their lives. (p. 407)
			A)	True
			B)	False
7		For genetic diseases, dominant and recessive alleles have different patterns of inheritance as demonstrated by pedigree charts. (p. 409)
			A)	True
			B)	False
8		When two people with medium-brown skin reproduce with one another, the children will all have medium-brown skin. (p. 411)
			A)	True
			B)	False
9		The Rh factor is inherited jointly with A, B, AB, or O blood types. (p. 412)
			A)	True
			B)	False
10		Sickle-cell disease is controlled by incompletely dominant alleles. (p. 413)
			A)	True
			B)	False
11		In Africa, where malaria occurs, infants with sickle-cell trait have a better chance of survival than the normal homozygote. (p. 413)
			A)	True
			B)	False
12		Regarding x-linked recessive genetic conditions, both males and females are affected with equal frequency. (p. 414)
			A)	True
			B)	False
13		Color-blind females are rare because they must receive the allele from both parents. (p. 414)
			A)	True
			B)	False
14		The lack of a protein called dystrophin causes the most common form of muscular dystrophy. (p. 415)
			A)	True
			B)	False