Lesson Worksheet: Monohybrid Inheritance Biology

In this worksheet, we will practice recalling Mendel’s laws of inheritance and interpreting genetic diagrams of monohybrid crosses.

Q1:

State the phenotypic ratio (dominant to recessive) for the Punnett square provided.

  • A04
  • B40
  • C22
  • D31

Q2:

Which of the following correctly describes the relationship between chromosomes and genes?

  • AThere are many genes located on a single chromosome.
  • BThere are many chromosomes within one gene.

Q3:

Which of the following Punnett squares shows the correct inheritance of sex in humans?

  • A
  • B
  • C
  • D

Q4:

State the phenotypic ratio (dominant to recessive) for the Punnett square provided.

  • A3:1
  • B1:3
  • C2:2
  • D0:4

Q5:

State the phenotypic ratio (dominant to recessive) for the Punnett square provided.

  • A31
  • B21
  • C13
  • D40

Q6:

Gregor Mendel investigated the inheritance of genes through breeding experiments using his pea plants. From these experiments, he produced three laws of inheritance. Which of the following best explains Mendel’s law of independent assortment?

  • AAlleles on separate chromosomes will not interact with each other in offspring.
  • BGenes that are responsible for different characteristics will be inherited independently of each other.
  • CA gamete of an organism will carry only one allele for each gene.
  • DThe combination of alleles in the offspring will be dependent on the combination of alleles in the parents.

Q7:

Gregor Mendel bred a population of pea plants, producing a large number of offspring. Of this offspring 6,022 plants produced yellow seeds and 2,001 produced green seeds.

What percentage of the total offspring displayed the dominant trait? Give your answer to the nearest whole number.

Q8:

Gregor Mendel investigated the inheritance of genes through breeding experiments using his pea plants. From these experiments, he produced three laws of inheritance. Which of the following best explains Mendel’s law of segregation?

  • AThe alleles for a gene are kept at separate positions on a chromosome.
  • BA gamete of an organism will carry only one allele for each gene.
  • CWhen gametes combine in fertilization, the alleles for each gene will come from one parent only.
  • DA gamete of an organism will carry only two alleles for each gene.

Q9:

In a species of a pea plant, the allele for green pods is dominant to that for yellow pods. The diagram provided shows two parent pea plants being crossed. Which of the following Punnet squares shows the correct cross?

  • A
  • B
  • C

Q10:

In a species of pea plants, the allele for green pods is dominant to that for yellow pods.

The diagram provided shows two parent pea plants being crossed.

What is the probability, in percent, that the offspring will have a green pod?

This lesson includes 29 additional questions and 1 additional question variation for subscribers.

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