Mendelian Genetics

An organism that has two identical genes for a trait is said to be

• heterozygous
• homozygous
• a hybrid
• incompletely dominant

Which of these would best be described as a phenotype?

• Bb
• Pp
• brown hair
• mutation

Given the following situation, if a person has brown hair with a genotype of Bb, where big B is brown hair and little b is blond hair, which is the dominant gene?

• B
• b
• Neither
• not enough information to determine 

When the genotype consists of a dominant and a recessive allele, the phenotype will be like the ______________ allele.

• dominant
• recessive
• both
• neither

An allele is a

• homozygous genotype
• another word for gene
• heterozygous genotype
• one of several possible forms of a gene

When Gregor Mendel bred the pea plants,he found that the yellow pea phenotype hid the green colored phenotype. Why?

• Yellow was the dominant phenotype
• Green was the weaker phenotype
• Yellow was the recessive phenotype
• Green was controlled by a dominant trait so the phenotype was green

A Heterozygous yellow pea plant's genotype would be:

• YY
• yy
• Yy
• Yg

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The passing of traits from parents to offspring

• Genetics
• Geneology
• Heredity
• Allele

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The study of heredity is known as

• Hereditology
• Genetics
• Biology
• Law of Heredity

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What is an organism's genetic makeup known as?

• Phenotype
• Chromosome
• DNA
• Genotype

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