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20 terms

Biology 1, Chapter 11

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allele
one of a number of different forms of a gene
codominance
Both alleles contribute to the phenotype
fertilization
fusion of male and female gametes
gamete
specialized cell involved in sexual reproduction
gene
sequence of DNA that codes for a protein and thus determines a trait
genetics
The scientific study of heredity
genotype
genetic makeup of an organism
heterozygous
having two different alleles for a trait
homozygous
having two identical alleles for a trait
hybrid
offspring of crosses between parents with different traits
incomplete dominance
one allele is not completely dominant over the other allele
independent assortment
the random distribution of the pairs of genes on different chromosomes to the gametes
multiple alleles
three or more alleles of the same gene
phenotype
physical characteristics of an organism
polygenic traits
trait controlled by two or more genes
probability
a measure of how likely it is that some event will occur
punnett square
diagram showing the gene combinations that might result from a genetic cross
segregation
separation of alleles during gamete formation
trait
a characteristic that an organism can pass on to its offspring through its genes.
true-breeding
organisms that produce offspring identical to themselves if allowed to self-pollinate