Biology questions ! !?

Assume that short hair (L) is dominant to long hair (l). If a short-haired parent of unknown origin is crossed with a long-haired parent and they produce one long-haired and one short-haired offspring, this would tell you that


a) the short-haired animal was pure-breeding (homozygous)


b) the short-haired animal was not pure-breeding (heterozygous)


c) the long-haired animal was not pure-breeding


d) the long-haired animal was pure-breeding





Replication of DNA is said to be "semiconservative" because___________.


aeach separated strand serves as a template to make an exact copy


fragments of each strand code for the formation of a new strand


the whole DNA molecule serves as a template for making new DNA


only occasionally will one strand serve as a template for new DNA


DNA makes mRNA, which in turn codes for the formation of tRNA





James Watson and Francis Crick_____________.


established the double-stranded nature of DNA


confirmed the principle of base pairing


explained how DNA's structure permitted it to be replicated


proposed the concept of the double helix


All of the above are true

Biology questions ! !?
1.b


2.a


3.d