chpt 2 quiz
What proportion of there children will be heterozygous?
1/2
Two heterozygous people are able to taste PTC chemical. Can only taste it in dominant allele, not recessive. What proportion of their children would be expected not to be able to taste PTC?
1/4
how many ABO phenotypes (blood types) are there?
4
according to the principle of independent assortment there is a ___ chance that any tall pea plant will produce either yellow or green peas.
50%
mendelian traits
are governed by one genetic locus
what is type AB blood an example of?
codominance
gregor mendel
did not know about chromosomes
polygenic traits
have a continuous range of expression
what is the only source of new genetic material in any population?
mutation
what produces new alleles at a locus?
mutation
what is the term used to the observable, physical expression of genotypes?
phenotype
evolution can be described as a two-stage process that includes which of the following?
production of variation followed by natural selection acting on this variation
what does each mitochondrion contain?
several copies of a ring-shaped DNA molecule, or chromosome
evolution can be most succinct defined as
the change in allele frequency from one generation to the next