Mendelian Genetics and Phenotypic Variation Quiz

Explore Mendel's principles, trait inheritance, and probability in this quiz on Mendelian genetics. Test your knowledge now!

#1

In Mendel's experiments with pea plants, what is the expected phenotypic ratio in the F2 generation of a monohybrid cross?

3:1
1:2:1
9:3:3:1
1:1
#2

What is the term for the observable characteristics or traits of an organism?

Genotype
Phenotype
Homozygote
Heterozygote
#3

What is the probability of rolling a die and getting a 3 or a 5?

1/3
1/6
1/2
1/4
#4

What term refers to the likelihood of an event occurring?

Phenotype
Genotype
Genotypic ratio
Probability
#5

What is the phenotypic ratio of a monohybrid cross between two heterozygous individuals?

3:1
1:2:1
9:3:3:1
1:1
#6

What term refers to the observable expression of a specific trait?

Allele
Genotype
Phenotype
Chromosome
#7

What is the term for the alleles an organism possesses for a particular trait?

Phenotype
Homozygote
Genotype
Dominance
#8

Which of the following best describes Mendel's Law of Segregation?

Alleles of different genes assort independently during gamete formation.
Each allele segregates into a different gamete during meiosis.
Alleles of the same gene separate into different gametes during meiosis.
Genes located on different chromosomes segregate independently.
#9

What is the likelihood of producing a homozygous recessive offspring from a dihybrid cross of two heterozygous individuals?

1/4
1/2
1/16
3/4
#10

Which of the following statements best describes epistasis?

One gene masks the effect of another gene at a different locus.
The interaction between multiple genes results in continuous variation.
Both alleles contribute equally to the phenotype.
A single gene has multiple phenotypic effects.
#11

In a dihybrid cross, how many different gamete combinations are possible if the parents are heterozygous for both traits?

4
8
16
32
#12

Which of the following accurately describes a test cross?

Crossing two individuals heterozygous for a trait
Crossing an individual with a dominant phenotype to a homozygous recessive individual
Crossing two individuals with the same phenotype
Crossing two individuals with different genotypes
#13

What is the probability of flipping a coin and getting heads three times in a row?

1/2
1/4
1/8
1/6
#14

In a dihybrid cross, what is the expected phenotypic ratio of the F2 generation if both parents are heterozygous for both traits?

9:3:3:1
1:2:1
3:1
1:1:1:1
#15

In incomplete dominance, what is the phenotype of the heterozygous individual?

Intermediate between the two homozygotes
Same as one of the homozygotes
Different from both homozygotes
Dominant over the other homozygote
#16

What phenomenon explains the occurrence of traits such as height and skin color that show a continuous range of variation?

Pleiotropy
Polygenic inheritance
Epistasis
Incomplete dominance
#17

Which of the following terms describes a situation where one gene has multiple phenotypic effects?

Epistasis
Incomplete dominance
Pleiotropy
Polygenic inheritance
#18

Which of the following statements accurately describes Mendel's Law of Independent Assortment?

The alleles of different genes assort independently during gamete formation.
Each allele segregates into a different gamete during meiosis.
Alleles of the same gene separate into different gametes during meiosis.
Genes located on different chromosomes segregate independently.

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