Heredity and Genetics

17 terms by kolbrys1

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heredity

the passing of traits from parents to offspring

trait

a characteristic that an organism can pass on to its offspring through its genes

genetics

the scientific study of heredity

fertilization

the process in which an egg cell and a sperm cell join to form a new organism

purebred

the offspring of many generations that have the same traits

gene

the set of information that controls a trait; a segment of DNA on a chromosome that codes for a specific trait

allele

the different forms of a gene

dominant allele

an allele whose trait always shows up in the organism when the allele is present

recessive allele

an allele that is masked when a dominant allele is present

hybrid

an organism that has two different alleles for a trait

probability

a number that describes how likely it is that an event will occur

Punnett square

a chart that shows all the possible combinations of alleles that can result from a genetic cross

phenotype

an organism's physical appearance or visible traits

genotype

an organism's genetic makeup or allele combinations

homozygous

having two identical alleles for a trait

heterozygous

having two different alleles for a trait

codominance

a condition in which neither of two alleles of a gene is dominant or recessive

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