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In ethereal book lice (Psocoptera pneuma), spiny legs (s+) is dominant to spineless legs (s), but...

In ethereal book lice (Psocoptera pneuma), spiny legs (s+) is dominant to spineless legs (s), but 32.5% of heterozygotes have spineless legs instead. This is an example of which of the following?


Incomplete penetrance

Variable expressivity

Genetic maternal effects

Genomic imprinting

Sex-limited trait

Sex-influenced trait

Sex-linked trait

Lethal alleles

Solutions

Expert Solution

The Correct Answer is- INCOMPLETEPENETRANCE

PENETRANCE-Penetrance is defined as the proportion of the individuals carrying a particular variant of a gene that is expressed as an associated trait.

COMPLETE PENETRNCE - when 100% of individuals in a population show the expected phenotype.

INCOMPLETE PENETRANCE- If some people with the mutation do not develop features of the disorder, the condition is said to have reduced (or incomplete) penetrance

Explanation of the other options-

Genetic Maternal effects- it is the condition which the organism(offspring) expresses a phenotype that is actually similar to the genotype.

Sex limited trait- A particular type of  phenotypes that are only expressed in particular sex( either in male or female)

Genomic imprinting- A gene is said to be imprinted when one copy of the gene is expressible or functional and the other copy of the gene is switched off. This change occurs epigenetic modification of the genomic domain.

Variable expressivity- It is determined as the degree to which a particular combination of genotype expresses into a range of varying phenotypes.

Sex influenced trait- These are the phenotypes encoded by the autosomal chromosome, but the expression of which is influenced by the sex or the gender.

gladiator answered 2 years ago
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