Mendelian Genetics Exam-
2025 2026[Complete Exam
prep Questions with verified
Answers] 100%Correct
Answers
1. Who is known as the father of Mendelian genetics?
A. Watson
B. Crick
C. Mendel
D. Darwin
Answer: C
Rationale: Gregor Mendel established the basic laws of
inheritance using pea plant experiments.
2. What organism did Mendel primarily study?
A. Fruit flies
B. Pea plants
C. Mice
D. Corn
Answer: B
Rationale: Pea plants were ideal due to clear traits and fast
reproduction.
,3. What is a dominant allele?
A. Always hidden
B. Expressed only in homozygous state
C. Expressed in heterozygous condition
D. Always mutated
Answer: C
Rationale: Dominant alleles express their trait even when
only one copy is present.
4. What is a recessive allele?
A. Always expressed
B. Expressed only when two copies are present
C. Stronger than dominant
D. Found only in plants
Answer: B
Rationale: Recessive traits appear only when no dominant
allele is present.
5. What does genotype refer to?
A. Physical appearance
B. Genetic makeup
C. Environment
D. Protein structure
Answer: B
Rationale: Genotype is the combination of alleles an
organism carries.
,6. What does phenotype refer to?
A. DNA sequence
B. Chromosome number
C. Observable traits
D. RNA sequence
Answer: C
Rationale: Phenotype is the physical expression of genes.
7. What is a homozygous genotype?
A. Two different alleles
B. One allele
C. Two identical alleles
D. No alleles
Answer: C
Rationale: Homozygous means both alleles are the same.
8. What is a heterozygous genotype?
A. Identical alleles
B. Different alleles
C. No genes
D. Mutated chromosomes
Answer: B
Rationale: Heterozygous means two different alleles are
present.
9. What is a Punnett square used for?
A. DNA sequencing
, B. Predicting inheritance outcomes
C. Protein synthesis
D. Cell division
Answer: B
Rationale: It models possible genetic combinations from
parents.
10. What is the law of segregation?
A. Genes blend together
B. Alleles separate during gamete formation
C. Traits disappear
D. DNA replicates randomly
Answer: B
Rationale: Each gamete receives one allele for each gene.
11. What is the law of independent assortment?
A. Genes are linked always
B. Traits are inherited independently
C. DNA does not replicate
D. Alleles blend
Answer: B
Rationale: Genes for different traits assort independently
during meiosis.
12. What is a monohybrid cross?
A. Two traits
B. One trait
2025 2026[Complete Exam
prep Questions with verified
Answers] 100%Correct
Answers
1. Who is known as the father of Mendelian genetics?
A. Watson
B. Crick
C. Mendel
D. Darwin
Answer: C
Rationale: Gregor Mendel established the basic laws of
inheritance using pea plant experiments.
2. What organism did Mendel primarily study?
A. Fruit flies
B. Pea plants
C. Mice
D. Corn
Answer: B
Rationale: Pea plants were ideal due to clear traits and fast
reproduction.
,3. What is a dominant allele?
A. Always hidden
B. Expressed only in homozygous state
C. Expressed in heterozygous condition
D. Always mutated
Answer: C
Rationale: Dominant alleles express their trait even when
only one copy is present.
4. What is a recessive allele?
A. Always expressed
B. Expressed only when two copies are present
C. Stronger than dominant
D. Found only in plants
Answer: B
Rationale: Recessive traits appear only when no dominant
allele is present.
5. What does genotype refer to?
A. Physical appearance
B. Genetic makeup
C. Environment
D. Protein structure
Answer: B
Rationale: Genotype is the combination of alleles an
organism carries.
,6. What does phenotype refer to?
A. DNA sequence
B. Chromosome number
C. Observable traits
D. RNA sequence
Answer: C
Rationale: Phenotype is the physical expression of genes.
7. What is a homozygous genotype?
A. Two different alleles
B. One allele
C. Two identical alleles
D. No alleles
Answer: C
Rationale: Homozygous means both alleles are the same.
8. What is a heterozygous genotype?
A. Identical alleles
B. Different alleles
C. No genes
D. Mutated chromosomes
Answer: B
Rationale: Heterozygous means two different alleles are
present.
9. What is a Punnett square used for?
A. DNA sequencing
, B. Predicting inheritance outcomes
C. Protein synthesis
D. Cell division
Answer: B
Rationale: It models possible genetic combinations from
parents.
10. What is the law of segregation?
A. Genes blend together
B. Alleles separate during gamete formation
C. Traits disappear
D. DNA replicates randomly
Answer: B
Rationale: Each gamete receives one allele for each gene.
11. What is the law of independent assortment?
A. Genes are linked always
B. Traits are inherited independently
C. DNA does not replicate
D. Alleles blend
Answer: B
Rationale: Genes for different traits assort independently
during meiosis.
12. What is a monohybrid cross?
A. Two traits
B. One trait
