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