Question

Pseudoalleles are
(a)Two closely placed gene with nearly similar expression
(b)Forms of same alleles
(c)Mutations in different genes produce alleles with similar effects.
(d)Alleles producing similar effect under changed condition

Answer 1

Pseudoallelism refers to a condition in which two genes with similar functions are located so close to one another. They are usually inherited as a single unit.

Complete answer:
Pseudoalleles is a state in which the two genes having similar expressions are located close to each other on a chromosome. Which means that they are genetically linked. So they are always inherited together. Since the two genes have nearly similar functions, they may appear to act as a single gene. In rare cases, the two linked pseudoalleles can be separated, or recombined. pseudoalleles can be formed as a result of gene duplication events, and the duplicated genes can undergo gene evolution to develop new functions.

Additional Information: -Pseudogenes are the imperfect, mutant, and non-functional genes, which are strikingly homologous to their functional counterparts at different loci.
-They are the divergent members of gene families, which have become non-functional through mutations in the course of evolution.
-They have sequences that correspond to the exons and introns of functional genes. They have no transcriptional and translational powers.
So, the correct answer is ‘Two closely placed genes with nearly similar expressions’.

Note: - Alleles or allelomorphs are alternative forms of a gene that occupy identical loci on homologous chromosomes and control the contrasting forms of the same trait.
-Usually, a gene exists in two allelic forms, dominant and recessive. The dominant allele would be expressed always. But recessive alleles are expressed only in the absence of the dominant allele. This is because the dominant allele would mask or suppress the expression of the recessive alleles.
-Gene is the hereditary factor, or the determiner of heredity, that governs heredity, produces variation, controls metabolism, and directs development. It consists of a contiguous segment of DNA.