Mendelian Genetics and Punnett Squares Quiz

Explore Mendelian genetics with questions on traits, crosses, and probabilities. Test your understanding now!

#1

Which of the following is a characteristic of Mendelian genetics?

Continuous variation
Discrete traits
Polygenic inheritance
Environmental influence
1 answered
#2

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

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

What is the term for an allele that is only expressed in the phenotype if two copies are present?

Dominant allele
Recessive allele
Heterozygous allele
Incomplete allele
1 answered
#4

Which of the following is an example of incomplete dominance?

Brown hair in humans
Widow's peak hairline
Red and white flowers in snapdragons
Round and wrinkled seeds in pea plants
1 answered
#5

What is the term for a gene that masks the expression of another gene?

Recessive gene
Dominant gene
Heterozygous gene
Polygenic gene
1 answered
#6

Which of the following is not a possible blood type in the ABO blood group system?

AB
OO
AO
BB
1 answered
#7

Which of the following represents a homozygous genotype?

Aa
BB
Bb
AB
1 answered
#8

What is the probability of obtaining a homozygous recessive offspring from a heterozygous parent?

25%
50%
75%
100%
1 answered
#9

What is the genotype of a male individual in terms of sex chromosomes?

XX
XY
YY
XXY
1 answered
#10

In a sex-linked trait, if a female is a carrier (heterozygous) for the trait, what is the chance her son will express the trait?

0%
25%
50%
100%
1 answered
#11

What is the term for the genetic makeup of an organism?

Phenotype
Genotype
Homozygous
Heterozygous
1 answered
#12

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

1:1
3:1
9:3:3:1
2:1
1 answered
#13

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

9:3:3:1
3:1
1:2:1
1:1:1:1
1 answered
#14

What is the principle of segregation?

Different genes assort independently during gamete formation
Each pair of alleles segregates during gamete formation
Alleles of different genes are transmitted independently
Alleles are expressed independently of each other
1 answered
#15

What is the term for the phenomenon where one gene influences multiple phenotypic traits?

Incomplete dominance
Codominance
Pleiotropy
Epistasis
1 answered
#16

What is the expected phenotypic ratio of a cross between two individuals heterozygous for two unlinked traits?

9:3:3:1
1:1:1:1
3:1
1:2:1
1 answered
#17

What term describes the phenomenon where the expression of one gene masks or modifies the expression of another gene?

Epistasis
Codominance
Pleiotropy
Polygenic inheritance
1 answered

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