In: Anatomy and Physiology
Which of the following is most FALSE regarding the genetic substrate (variation) on which selection acts?
Group of answer choices
Inbreeding, caused by genetic drift, results in a high level of homozygosity in a population
Sex creates new combinations of genotypes
Genetic drift could reduce the levels of allelic and genotypic variation
Mutations are a source of allelic variation
Epigenetic modifications give rise to allelic diversity
Answer : The most false statement among these are:
Epigenetic modifications give rise to allelic diversity.
Epigenetic Modification: The epigenetic modifications do not change DNA sequence but it affects how cells read genes. The epigenetic modifications are stable and heritable gene expressions and cellular function without changes to orginal DNA sequences. Epigenetic modifications do not give rise to allelic diversity.
All other answers are true.
- Inbreeding caused due to genetic drift exhibits increased homozygosity.
- Sex combines two genotypes to create new one.
- Genetic drift reduces the genetic variation.
- Mutations results in formation of new alleles.