Fertilization - When male and female reproductive cells join during sexual reproduction
True-breeding - If they were allowed to self-pollinate, they would produce offspring identical to
themselves (always homozygous)
Cross-breeding - When offspring has two different parents
Trait - specific characteristic that varies from one individual to another
Genes - Chemical factors that determine traits
Allele - Different forms of a gene
Principle of Dominance - States that some alleles are dominant, and others are recessive
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
Gamete - sex cell; an egg or a sperm cell
Punnett Square - Diagram that can be used to predict what genetic variations that would result from a
cross
*Know how to do a 1 trait cross & a 2 trait cross Punnett Square*
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