RRYy
RrYY
RRYY
RRyy
RrYy

cross-pollination.
testcross.
heterozygous cross.
backcross.
determination cross.

gene pool.
trait or characteristic.
allele.
genotype.
phenotype.

homozygous.
segregating.
dominant.
unusually rare.
a hermaphrodite.

is not present as often as a dominant allele.
is expressed only in a homozygote.
cannot be inherited from a heterozygote.
depends upon a dominant partner for expression.
can only be inherited from a homozygous parent.

Mendel did not want to make fine distinctions between differing phenotypes.
Mendel's garden was too small to grow all 32 varieties.
These seven varieties had the highest yields of seeds per plant.
The others had patterns of inheritance that did not fit Mendel's theories.
Only these seven varieties of plants would breed true for their characteristics.

homozygous.
dominant.
true breeding
present in both parents.
assorting independently.

Mendel himself did not consider them important.
he failed to get the results of his experiments published.
other biologists failed to see the significance of his results.
he never presented his results at a scientific meeting.
a fire at the monastery destroyed all his original notes.

evolutionary theory
translating German papers into English
plant physiology
microscopy
biochemistry

He studied the offspring of many species.
He performed his experiments in an orderly and logical fashion.
He recorded his procedures so that others could repeat and verify his findings.
He chose an experimental organism that had many contrasting characters.
He counted the offspring from his crosses and analyzed his results mathematically.