process in which genetic material from a male sperm cell and female egg cell parents combine and produce offspring that is genetically diverse The joining of a sperm cell and an egg cell specific characteristic that varies from one individual to another the offspring of many generations that have the same traits (Homozygous genotype, for example, TT or tt) an allele whose trait always shows up in the organism when the allele is present an allele that is masked when a dominant allele is present offspring of crosses between parents with different traits (heterozygous genotype, for example: Tt) a tool that shows all the possible combinations of alleles that can result from a genetic cross one allele is not completely dominant over the other allele (red flowered parent and a white flowered parent breed to make a pink flowered offspring) a condition in which both alleles for a gene are fully expressed (a black feathered chicken and white feathered chicken breed to make a black/white feathered chicken)

1. sexual reproduction

process in which genetic material from a male sperm cell and female egg cell parents combine and produce offspring that is genetically diverse

2. fertilization

The joining of a sperm cell and an egg cell

3. trait

specific characteristic that varies from one individual to another

4. purebred

the offspring of many generations that have the same traits (Homozygous genotype, for example, TT or tt)

5. dominant allele

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

6. recessive allele

an allele that is masked when a dominant allele is present

7. hybrid

offspring of crosses between parents with different traits (heterozygous genotype, for example: Tt)

8. Punnett Square

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

9. incomplete dominance

one allele is not completely dominant over the other allele (red flowered parent and a white flowered parent breed to make a pink flowered offspring)

10. codominance

a condition in which both alleles for a gene are fully expressed (a black feathered chicken and white feathered chicken breed to make a black/white feathered chicken)