Genetics & Evolution - Principles of Inheritance

⏱ Time: 0s

Q1. Which of the following represents a phenotype? (2021)

Solution:

A phenotype is the observable characteristic, such as brown eyes.

⏱ Time: 0s

Q2. Which of the following terms describes the physical appearance of an organism? (2023)

Solution:

The term 'phenotype' refers to the physical appearance of an organism.

⏱ Time: 0s

Q3. In a dihybrid cross, what is the expected phenotypic ratio? (2023)

Solution:

The expected phenotypic ratio in a dihybrid cross is 9:3:3:1.

⏱ Time: 0s

Q4. Which of the following is NOT a type of inheritance pattern? (2021)

Solution:

Transgenic inheritance is not a recognized pattern of inheritance; it refers to organisms that have been genetically modified.

⏱ Time: 0s

Q5. What is the phenomenon called when one gene affects the expression of another gene? (2022)

Solution:

The phenomenon where one gene affects the expression of another gene is called epistasis.

⏱ Time: 0s

Q6. Which of the following is an example of a dihybrid cross? (2019)

Solution:

A dihybrid cross involves two traits, and AaBb x AaBb is an example of such a cross.

⏱ Time: 0s

Q7. What is the role of a Punnett square? (2023)

Solution:

A Punnett square is used to predict the genotypes of offspring from a genetic cross.

⏱ Time: 0s

Q8. In a cross between a homozygous tall plant (TT) and a homozygous short plant (tt), what will be the genotype of the F1 generation? (2019)

Solution:

The genotype of the F1 generation from a cross between TT and tt will be Tt (all offspring will be heterozygous).

⏱ Time: 0s

Q9. What is the probability of obtaining a homozygous recessive offspring from a cross between two heterozygous parents? (2022)

Solution:

The probability of obtaining a homozygous recessive offspring (aa) from a cross between two heterozygous parents (Aa x Aa) is 25%.

⏱ Time: 0s

Q10. In a cross between a red flowered plant (RR) and a white flowered plant (rr), what will be the color of the flowers in the F1 generation? (2019)

Solution:

The F1 generation will have red flowers since red is dominant over white.