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HCS Biology

Chapter 5.4 (BJU Press)

TermDefinition
self-pollination The process by which a plant's structure allows its own pollen to provide the sperm for fertilization of ova.
cross-pollinate To fertilize a flower with pollen from another flower.
dominant trait The characteristic that is expressed even in the presence of the recessive genes.
recessive trait The characteristic that is expresses only in the homozygous recessive condition.
phenotype The physical expression of an organism's gene.
genotype The genetic makeup of an individual organism.
locus The specific location of a gene on a chromosome.
allele One pair of genes that have the same position on homologous chromosomes.
homozygous Having the same two alleles at the same position (locus) on homologous chromosomes.
heterozygous Having two different alleles at the same position (locus) on homologous chromosomes.
monohybird cross A genetic cross that deal with only one set of characteristics.
Punnett square A diagram used to visualize genetic crosses.
test cross The mating of an organism that possesses a dominant phenotype but unknown genotype with an organism that possesses a recessive phenotype to determine the genotype of the dominant individual.
pedigree A diagram that shows the characteristics of several generations of organisms.
Created by: ccpoirot
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