Chapter 11.1 - 11.3 Genetics

A Heterozygous yellow pea plant's genotype would be:

• YY
• yy
• Yy
• Yg

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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

What is a phenotype?

• The expression of a trait; physical appearance.
• refers to the genetic makeup of an individual
• An organism that has the same genes for a trait (ex. TT or tt)
• the passing of traits from parent to offspring

The combination of alleles an organisms inherited from each parent is called...

• genotype
• phenotype
• protein
• chromosome

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

• recessive allele
• dominant allele
• hidden allele
• present allele

Which of the following phenotypes is homozygous recessive?

• Tt
• tt
• TT
• T

Dominant alleles are represented by a:

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

In the punnett square shown, what must the genotype of the missing parent be?

• BB
• Bb
• bb
• Tt

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A person heterozygous for wet earwax (Ww) mates with a person homozygous recessive for dry earwax. What is the chance their baby is heterozygous?

• 0%
• 25%
• 50%
• 100%

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Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?

• 0 %
• 25%
• 50%
• 75%

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