Introduction to Genetics

Which is heterozygous ?

• Tt

• TT

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Which is homozygous ?

• Zz

• SS

The genetic makeup of an organism

• heterozygous

• punnet square

• genotype

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What is a phenotype?

• The genetic make up (code)

• The physical trait

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An allele whose trait only shows up when no dominant allele is present.

• hidden allele

• dominant allele

• recessive allele

• present allele

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What does heterozygous mean?

• An organism that has the same genes for a trait (TT or tt)
• An organism that has different genes for a trait (Tt)
• When neither gene is fully dominant; offspring is a mixture of both
• the different forms of a trait (hair color--> brown, blonde, red

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A heterozygous yellow pea plant's genotype would be:

• YY
• yy
• Yy

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Who is called the "Father of Genetics"?

• Walter Sutton
• Albert Einstein
• Gregor Mendel
• Charles Darwin

The different forms of genes are known as

• environment
• probability
• traits
• alleles

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Dominant alleles are represented by a:

• Male gene
• lowercase letter
• recessive trait
• capital letter