Q: Which equation represents the calculation of recombination frequency between two genes?

$$\text{Recombination Frequency} = \frac{\text{Number of Recombinant Offspring}}{\text{Total Number of Offspring}} \times 100$$

Question 1

Gregor Mendel is known for his foundational work in genetics. Which of the following best describes Mendel's contribution to biology?

Accepted Answer

He established the principles of inheritance through experiments with pea plants.

Question 2

In a monohybrid cross between two heterozygous pea plants ($$Aa 	imes Aa$$), what is the expected genotype ratio among the offspring?

Accepted Answer

$$1:2:1 (AA$$:Aa:aa)

Question 3

A person with type B blood has a parent with type O blood. Which genotype is possible for the person with type B blood?

Accepted Answer

$$IBi$$

Question 4

If a plant with genotype $$GgSs is $$crossed with a plant with genotype $$ggSs$$, what is the expected phenotype ratio for the offspring?

Accepted Answer

3 Green Striped : 1 Green Solid : 3 Yellow Striped : 1 Yellow Solid

Question 5

Which of the following best describes codominance in the context of ABO blood groups?

Accepted Answer

Both $$IA$$ and $$IB$$ alleles are expressed equally, resulting in both A and B antigens on red blood cells.

Question 6

A pedigree chart shows a trait that appears in every generation and affects both males and females equally. What type of inheritance is most likely?

Accepted Answer

Autosomal dominant

Question 7

Which term describes an individual who carries one copy of a recessive allele for a genetic disorder but does not show symptoms?

Accepted Answer

Carrier

Question 8

In a test cross, an individual with an unknown genotype is crossed with a homozygous recessive individual. If all offspring display the dominant phenotype, what is the genotype of the unknown individual?

Accepted Answer

Homozygous dominant

Question 9

Which of the following is an example of incomplete dominance?

Accepted Answer

A cross between red and white flowers produces pink flowers.

Question 10

Which statement about polygenic inheritance is correct?

Accepted Answer

Traits are determined by multiple genes, resulting in a continuous range of phenotypes.

Question 11

A woman with genotype $$IAIB$$ for the ABO blood group marries a man with genotype $$ii. $$What are the possible blood types of their children?

Accepted Answer

Type A and Type B

Question 12

Which of the following best describes pleiotropy?

Accepted Answer

A single gene affects multiple traits.

Question 13

Linked genes are inherited together because they are located close to each other on the same chromosome. Which of the following statements is true about linked genes?

Accepted Answer

They have a recombination frequency less than 50%.

Question 14

A Punnett square is used to predict the outcome of genetic crosses. Which of the following is NOT a function of a Punnett square?

Accepted Answer

Sequencing DNA

Question 15

In a dihybrid cross ($$AaBb 	imes AaBb$$), what is the expected phenotype ratio if both traits show complete dominance?

Accepted Answer

$$9:3:3:1$$

Question 16

Which of the following best describes a genotype?

Accepted Answer

The genetic makeup of an organism

Question 17

A male inherits an X-linked recessive disorder. Which of the following must be true?

Accepted Answer

He inherited the mutant allele from his mother.

Question 18

Which equation represents the calculation of recombination frequency between two genes?

Accepted Answer

$$	ext{Recombination Frequency} = \frac{	ext{Number of Recombinant Offspring}}{	ext{Total Number of Offspring}} 	imes 100$$

Question 19

Which scenario best illustrates polygenic inheritance in humans?

Accepted Answer

Height, which is influenced by many genes and shows a continuous range of values.

Question 20

A couple has a child with type O blood. If one parent is type AB, what must be the genotype of the other parent?

Accepted Answer

$$ii$$

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