Unit 4: Genetics Vocab Quiz 1

A dominant allele

• masks recessive alleles

• is masked by recessive alleles

• does not show up

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The observable characteristics or traits of an organism. It's what you can see, red hair, tall, etc.

• genotype

• phenotype

• dominant

• homozygous

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The basic unit of heredity that consists of a segment of DNA on a chromosome

• chromosome

• double helix

• homozygous

• gene

An organism that inherits two of the same alleles from its parents. TT, tt

• dominant

• phenotype

• heterozygous

• homozygous

A term that describes an allele that is not expressed when combined with a dominant form of the allele

• gene

• recessive

• homozygous

• phenotype

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The passing of genes from parents to offspring

• Punnett Square

• probability

• genetics

• heredity

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An organism that inherits two different alleles from its parents

• dominant

• recessive

• homozygous

• heterozygous

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What is this: Bb

• phenotype

• genotype

• probability

• trait

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What is a phenotype?

• The genetic make up (code or letters)

• The physical appearance of a gene

a tool used to predict the results from crossing 2 sets of allelles

• microscope

• Punnett square

• Jawsome trapezoid

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