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Transcript
GENETICS REVIEW A physical trait that shows as a result of an organism’s particular genotype. PHENOTYPE An organism that has two different alleles for a trait. HETEROZYGOUS The mathematical chance that an event will occur. PROBABILITY Form of a trait that appears to overshadow or mask another form of the same trait. DOMINANT A synonym for heterozygous. HYBRID A characteristic of an organism controlled by a gene. TRAIT Male sex cell. SPERM Strands of DNA and protein found in the nucleus of a cell carrying the code for the characteristics of an organism. CHROMOSOME A synonym for homozygous. PUREBRED A tool for predicting possible traits in offspring. PUNNETT SQUARE Occurrence of a trait that makes individuals different from members of the same species. VARIATION Form of a trait that can disappear in a population but can reappear in future generations. RECESSIVE Segment of DNA on a chromosome controlling the inheritance of traits. GENE Female sex cell. EGG The different forms a gene may have for a trait. ALLELE An organism that has two identical alleles for a trait. HOMOZYGOUS The genetic makeup of an organism for a trait; alleles in a gene pair. GENOTYPE Pair of chromosomes containing alleles for the same traits. HOMOLOGOUS The passing of traits from parent to offspring. HEREDITY * Knowing the vocabulary is half the battle . . . You must also know how to apply the terminology in order to answer questions about the relationship between parents and their offspring. GENETICS THE STUDY OF HEREDITY
