Question

Haploid are used for researches because
(a) They contain only one chromosome
(b) They contain two sets of chromosomes
(c) They contain three sets of chromosomes
(d) They contain only one set of chromosomes

Answer 1

These cells are formed through the meiosis. They pertain to a condition, a cell, or an organism that has half of the usual complete set of chromosomes in somatic cells. They are defined as saprophytes with gametophytic chromosome number and have been produced in a variety of plant species using a variety of methods.

Correct step by step answer:
Haploids are used for research because of their unique genomic constitution, offer improved means of investigating many fundamental problems in genetics, cytogenetics, and genomics. These cells contain only one set of chromosomes. Thus require the inactivation of a single allele to elucidate its loss- of- function phenotype.
In addition, the critical information regarding chromosomal homologies, chromosomal and genome evolution, chromosomal and gene dosage effects, the basis of meiotic pairing, and other genetically controlled phenomena may be obtained from the study of haploids.
Mutations, gene- cytoplasmic, and gene- environmental interactions can be more readily detected and studied, without interference from factors such as heterozygosity. Haploidy has special suitability for the detection of genetic regulatory systems of an operon- like nature that may exist in higher organisms, and in studies of genetic fine structure, genetic transformation (transgenesis) , and nucleus.
- Cytoplasmic organelle interactions in higher plants.
So, the correct answer is '(d) They contain only one set of chromosomes'.

Note: During fertilization when the haploid cells from male and female fuse together, it forms a diploid cell. Gametes or sex cells are the most common type of haploid cells. They are produced by meiosis and are genetically diverse. During fertilization when the haploid cells from male and female fuse together, it forms a diploid cell.