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Unit 4-. The different forms of a gene An allele whose trait always shows up in the organism…

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 An allele whose trait always shows up in the organism when the allele is present.
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GENETICS Unit 4-
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Page 1: Unit 4-. The different forms of a gene An allele whose trait always shows up in the organism…

GENETICSUnit 4-

Page 2: Unit 4-. The different forms of a gene An allele whose trait always shows up in the organism…

ALLELES

The different forms of a gene

Page 3: Unit 4-. The different forms of a gene An allele whose trait always shows up in the organism…

DOMINANT ALLELE

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

Page 4: Unit 4-. The different forms of a gene An allele whose trait always shows up in the organism…

GENE

A segment of DNA on a chromosome that codes for a specific trait.

Page 5: Unit 4-. The different forms of a gene An allele whose trait always shows up in the organism…

GENETICS

The scientific study of heredity.

Page 6: Unit 4-. The different forms of a gene An allele whose trait always shows up in the organism…

GENOTYPE

An organism’s genetic makeup, or allele combination.

Page 7: Unit 4-. The different forms of a gene An allele whose trait always shows up in the organism…

HETEROZYGOUS

Having two different alleles for a trait.

Page 8: Unit 4-. The different forms of a gene An allele whose trait always shows up in the organism…

HOMOZYGOUS

Having two identical alleles for a trait.

Page 9: Unit 4-. The different forms of a gene An allele whose trait always shows up in the organism…

HYBRID

An organism that has two different alleles for a trait; an organism that is heterozygous for a particular trait.

Page 10: Unit 4-. The different forms of a gene An allele whose trait always shows up in the organism…

PHENOTYPE

An organism’s physical appearance, or visible traits.

Page 11: Unit 4-. The different forms of a gene An allele whose trait always shows up in the organism…

PUNNETT SQUARE

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

Page 12: Unit 4-. The different forms of a gene An allele whose trait always shows up in the organism…

PUREBRED

An organism that always produces offspring with the same form of a trait as the parent.

Page 13: Unit 4-. The different forms of a gene An allele whose trait always shows up in the organism…

RECESSIVE ALLELE

An allele that is masked when a dominant allele is present.

Recessive traits are only visible if an individual inherits two copies of the recessive allele

Page 14: Unit 4-. The different forms of a gene An allele whose trait always shows up in the organism…

TRAIT

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


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