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Genetic Diversity

When genetica...

Question

When genetically similar individuals of a population mate with each other repeatedly, it leads to ___.

A

Loss of heterozygosity

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B

Gain of heterozygosity

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C

Loss of homozygosity

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D

Gain of homozygosity or heterozygosity

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Solution

The correct option is A Loss of heterozygosity
When individuals of similar genetic mate with each other for successive generations, it leads to the accumulation of similar traits thereby making the entire genetic makeup of that population more homozygous. As different alleles are lost to the accumulation of similar alleles, the population loses heterozygosity which can lead to severe issues in the genetic health of the population.

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Q. A human population has a higher-than-usual percentage of individuals, with a genetic disease. The most likely explanation is

______ is mating between two individuals with different alleles at one genetic locus of interest.

Q. Read the following statements and select the correct option.
A. Increase in melanised moths after industrialisation in Great Britain is a proof for natural selection.
B. When more individuals of a population acquire a mean character value, it is called disruption.
C. Changes in allelic frequency in a population will lead to Hardy-weinberg equilibrium.
D. Genetic drift changes the existing gene or allelic frequency in future generations.

Q. Fill in the blanks
1. ___(i) ___ is the rate at which new individuals are added to a population by reproduction.
2. ___ (ii) ___ is the rate at which individuals are lost by death.
3. ___ (iii)

refers to individuals moving away from each other.
4. ___ (iv)

refers to individuals moving out of a population.
5.

refers to individuals moving into a population.

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