Nmdcat Practice Paper from PMDC Syllabus | mosaicbro.com

Nmdcat Practice Paper from PMDC Syllabus

7 of 197 questions (Page 16 of 29)

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106 Which of the following best describes Mendel’s Law of Dominance?
Correct Answer: A
Explanation: The Law of Dominance states that dominant alleles mask the expression of recessive alleles in heterozygous individuals.
107 In Mendel’s experiments, a homozygous tall plant is crossed with a homozygous dwarf plant. What is the height of the F1 generation?
Correct Answer: C
Explanation: The F1 generation will all be tall because the tall allele is dominant over the dwarf allele.
108 What was the key conclusion from Mendel’s dihybrid crosses?
Correct Answer: C
Explanation: Mendel concluded that traits are inherited independently, as demonstrated by the 9:3:3:1 ratio in dihybrid crosses.
109 A test cross is used to determine:
Correct Answer: C
Explanation: A test cross helps determine the genotype of a dominant individual by crossing it with a homozygous recessive individual.
110 Which generation did Mendel cross to get the 3:1 phenotypic ratio?
Correct Answer: C
Explanation: The 3:1 phenotypic ratio is observed in the F2 generation when F1 heterozygotes are crossed.
111 What is the phenotypic ratio in a test cross between a heterozygous tall plant and a dwarf plant?
Correct Answer: A
Explanation: A test cross between a heterozygous tall (Tt) and dwarf (tt) plant yields a 1:1 phenotypic ratio of tall to dwarf offspring.
112 The physical expression of a trait is known as:
Correct Answer: C
Explanation: Phenotype refers to the observable physical expression of a trait.
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