Question

Place the statements about inversions into the correct column. True False Most inversions do not result in an abnormal phenotype (other than reduced fertility) in heterozygotes. An inversion causes a mutant phenotype in heterozygotes only when DNA is deleted. An inversion cannot increase expression of genes near the inversion breakpoint If an inversion breakpoint lies within a gene, a loss- of-function mutation may occur. Genes at the borders of Inversion breakpoints may be expressed in different cells than usual. Reset

Answer 1

Ans 1) This statement is true.

Inversion mutation does not influence any change in the DNA which is a genetic material. Thus at phenotypic level no abnormalities are seen at phenotypic level and these mutations are viable.

Ans 2) This statement is false.

Inversion mutation occurs during the process of reproduction, when there is a breakdown of DNA which is away from chromosome after which this breaked DNA will reattach to the chromosome in chronological order. Paracentric and pericentric are types of inversion mutation.

Ans 3) This statement is false.

Ans 4) This statement is true.

It can change the phenotype.

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