Question

Find out the correct statement
A)Monosomy and nullisomy are the two types of euploidy
B)Polyploidy is more common in animals than in plants
C)Polyploids occur due to failure in the separation of complete sets of chromosomes
D)2n-1 is trisomy
E)Nonhomologous chromosome duplication produces autopolyploidy

Answer 1

A mutation is characterized as sudden, discontinuous variation due to changes in chromosomes and genes in the genotype and phenotype of an organism. Mutation, in addition to recombination, is another phenomenon leading to DNA variation.

Complete answer:
A)Two types of euploidy are monosomy and nullisomy: both are types of aneuploidy. Any change in the number of chromosomes in an organism during aneuploidy will be different from the multiple of the basic chromosome collection. It generally occurs because of the nondisjunction of the two chromosomes of the homologous pair (absence of separation of two homologous chromosomes during cell division) such that one gamete has an additional chromosome (n +1) while the other is deficient in one chromosome (n-1).

B)In animals, polyploidy is more common than in plants: it is also found in plants. Polyploidy typically results in sterility in the case of animals. Polyploidy, therefore, is unusual in animals. Two main groups fall under polyploidy: autopolyploidy and allopolyploidy.

C)Polyploids occur due to failure to separate complete sets of chromosomes: more than two sets of chromosomes are classified as polyploids. Failure of cytokinesis leads to an increase in a whole set of chromosomes in an organism following the telophase stage of cell division and this condition is called polyploidy.-

D)Trisomy is 2n-1: Trisomy is a type of Aneuploidy. This happens as a consequence of the 2n+1 condition. Down's syndrome is a trisomy of some kind.

E)Autopolyploidy is caused by nonhomologous chromosome duplication: autopolyploidy occurs due to the existence of many sets of chromosomes.

Hence, the correct answer is option (C)

Note: Polyploids occur due to failure to separate complete sets of chromosomes: more than two sets of chromosomes are classified as polyploids. Failure of cytokinesis leads to an increase in a whole set of chromosomes in an organism following the telophase stage of cell division and this condition is called polyploidy.