Most people are very aware of the date of their own birth, and as that date approaches they eagerly anticipate gifts, cake, and perhaps a party. Because people are aware that they remember their own birthdays,

Martin has the genotype to grow to be 6'3" tall, but his family is poor and he is malnourished as a child. As a result, he only grows to be 5'11". The difference between Martin's genotype and his phenotype can be explained by the concept of __________

a) polygenetic inheritance. b) dominant-recessive patterns. c) multifactorial inheritance. d) sex-linked inheritance.

If a baby is making speech-like, but meaningless, sounds, this is a universal phenomenon called

a) cooing. b) babbling. c) gurgling. d) murmuring.