Genetics Vocabulary

21 terms by Cocchino

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traits

the physical characteristics an individual/ organism has

inherited

traits that are passed down from parents to offspring

genetics

the scientific study of heredity

chromosomes

the nucleus has tiny rod-shaped bodies, made up of many genes

genes

a chromosome is made up of a chain of these, they pass on traits

DNA

compound that makes up genes

body cells

have paired chromosomes

23

each body cell has this number of pairs of chromosomes.

46

total number of chromosomes

gametes

have unpaired chromosomes (23) a human sperm or egg

alleles

the different forms of a gene

recessive allele

an allele whose trait is masked in the presence of a dominant allele.

hybrid

an organism with two different alleles for a trait

dominant allele

an allele whose trait is masked in the presence of a dominant allele.

Punnett Square

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

heterozygous

an organism that has two different alleles for a trait

genotype

an organism's that has two different alleles for a trait

codominance

inheritance pattern in which the alleles are neither dominant nor recessive

probability

the likelihood that a particular event will occur

homozygous

an organism that has two identical alleles for a trait.

phenotype

an organism's physical appearance

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