Genetics
Answer key
1. Chromosomes are:
A. A structure of nucleic acids and proteins - answer
B. Alleles
C. Nucleic acids
D. DNA
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Answer Explanation: Chromosomes are a structure of nucleic acids and proteins
2. Phenotypes are the:
A. Chromosomes
B. The appearance of a trait - answer
C. A combination of alleles of a specific gene
D. Hydrolysis
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Answer Explanation: Phenotypes are the appearance of a trait.
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3. How many alleles of each gene do sexually reproducing organisms have?
A. Five
B. Twenty-three
C. Seven
D. Two - answer
Answer Explanation: Sexually reproducing organisms have two alleles of each gene. An organism can inherit two of the identical alleles or two different alleles this combination is called a genotype
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4.Describe the differences between heterozygous and homozygous
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Answer Explanation: Organisms with two identical alleles are called homozygous. Heterozygous is when an organism inherits two different alleles. Dominant alleles are more than recessive alleles so, a heterozygous will show the dominant trait.
5. Explain incomplete dominance
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Answer Explanation: In a normal case the offspring would be red because red is the dominant trait but, incomplete dominance gives the offspring a mix of both the dominant and recessive traits.