Genetics Review

The passing of traits from parent to offspring 

• Heredity 
• Genetics 
• Hybrid 
• Probability 

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the genetic makeup of an organism

• heterozygous
• punnet square
• genotype

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A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?

• 100% BB
• 75% BB and 25%Bb
• 50 % BB and 50% Bb
• 50% Bb and 50% bb

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An offspring will receive how many alleles from each parent to determine a specific trait?

• one
• two
• three
• five

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Which of the following is a phenotype?

• BB
• Bb
• bb
• Blue eyes

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

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

What do you call a section of DNA that codes for a specific trait?

• nucleus
• chromosome
• gene
• DNA

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How many chromosomes are found in human egg and sperm cells?

• 20
• 23
• 26
• 46

__________ worked with pea plants to prove that traits are passed from parent to offspring.

• Reginald Punnett
• Gregor Mendel

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