Quantitative Genetics MCQs

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Questions and Answers

What is the formula for phenotype (P)?

P = G + E + GE (correct)
P = F + E
P = G + A
P = A + D

Which of the following best defines 'G' in the phenotype formula?

Genotype (correct)
Interaction effect
Genetic value
Environment effect

What does the term 'breeding value' refer to?

The average genetic variance in a population
The total genetic makeup of an organism
Environmental influences on phenotypes
The value of genes to progeny (correct)

Which effect is characterized as not being transmissible to progeny?

<p>Dominance deviation (A)</p> Signup and view all the answers

What does breeding value (BV) specifically represent?

<p>The average effect of genes that can be transmitted to future generations (B)</p> Signup and view all the answers

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Flashcards

Phenotype Formula

The phenotype is the observable characteristic of an organism, which is influenced by both its genotype and the environment. The formula P = G + E + GE expresses this, where 'P' represents the phenotype, 'G' represents the genotype, 'E' represents the environmental effects, and 'GE' represents the interaction between genotype and environment.

What is Genotype?

The genotype refers to the genetic makeup of an organism. It comprises the specific combination of alleles (alternative forms of a gene) that an individual possesses.

What is Breeding Value?

Breeding value (BV) is a measure of the genetic merit of an individual for a particular trait. Represents the value of an individual's genes to its progeny. The breeding value estimates the additive genetic effects that an individual can pass on to its offspring.

Dominance Deviation

Dominance deviation is the genetic effect that comes from the interaction between alleles. A dominant allele masks the effect of a recessive allele. Dominance deviation cannot be passed from parents to offspring.

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Additive Genetic Effects

Additive genetic effects are caused by the sum of the individual effects of each allele. These effects are directly passed down from parents to offspring. Additive genetic effects determine the breeding value.

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Study Notes

Quantitative Genetics MCQs

Phenotype Formula: P = G + E + GE
- P represents phenotype
- G represents genotype
- E represents environmental effect
- GE represents gene-environment interaction
Genotype (G) in Phenotype Formula: G represents the genotype, the genetic makeup of an organism.
Additive Genetic Effect (Breeding Value): The breeding value represents the portion of a genotype's effect that is passed on to offspring.
Non-Transmittable Genetic Effect: Dominance deviation is a component of a genotype's effect that is not transmitted to offspring. It describes the deviations from the additive effects.
Breeding Value (BV) Definition: The breeding value (BV) is the value of an animal's genes with respect to its offspring. It's the portion of the genotype that is passed to subsequent generations.

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Description

Test your knowledge with these multiple-choice questions on quantitative genetics. This quiz covers essential concepts such as phenotype formulas, breeding values, and genetic effects. Challenge yourself and deepen your understanding of how genetics influences phenotype.