Mendelian Genetics and Heredity - Real World Applications
Q. What is the expected genotypic ratio of a monohybrid cross?
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A.
1:1
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B.
3:1
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C.
1:2:1
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D.
9:3:3:1
Solution
The expected genotypic ratio of a monohybrid cross is 1:2:1, representing the combinations of alleles.
Correct Answer: C — 1:2:1
Q. What is the function of transfer RNA (tRNA) during protein synthesis?
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A.
To carry genetic information
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B.
To form ribosomes
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C.
To bring amino acids to the ribosome
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D.
To replicate DNA
Solution
tRNA brings amino acids to the ribosome during protein synthesis, matching them to the mRNA codons.
Correct Answer: C — To bring amino acids to the ribosome
Q. Which of the following is a characteristic of a recessive trait?
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A.
Expressed in homozygous individuals only
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B.
Expressed in heterozygous individuals
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C.
Always expressed
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D.
Dominates over other traits
Solution
A recessive trait is expressed only in homozygous individuals, meaning both alleles must be recessive.
Correct Answer: A — Expressed in homozygous individuals only
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