Traits and Inheritance Heredity Section 2

What is the ratio that Mendel found for dominant to recessive traits?

• 1 to 1

• 2 to 1

• 3 to 1

• 4 to 1

What do scientists call instructions for an inherited trait?

• alleles

• phenotype

• albinism

• genes

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What are the two forms of a gene called?

• alleles

• phenotype

• albinism

• genes

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What prevents hair, skin, and eyes from having any color?

• alleles

• albinism

• ratio

• probability

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What are both inherited alleles together called?

• an organism

• a genotype

• homozygous

• heterozygous

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What kind of plant has two dominant genes OR two recessive genes?

• an organism

• a genotype

• homozygous

• heterozygous

What kind of plant has one dominant gene AND one recessive gene?

• an organism

• a genotype

• homozygous

• heterozygous

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What is a phenotype?

• an inherited problem

• a group of 10 alleles

• a recessive gene

• the way an organism looks

Which two combinations of genotypes are exactly the same?

• PP and Pp

• Pp and pP

• pp and Pp

• pP and pp

What is the chance of a parent with one green allele and one blue allele giving a blue allele to an offspring?

• 100% chance

• 75% chance

• 50% chance

• 25% chance

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