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Haploids are more suitable for mutation studies than the diploids. This is because:
A
haploids are more abundant in nature than diploids
B
all mutations, whether dominant or recessive are expressed in haploids
C
haploids are reproductively more stable than diploids
D
mutagens penetrate in haploids more effectively than in diploids
Detailed Solution
Most mutations are recessive.
A diploid organism has two alleles for every gene, so a recessive mutation is masked by the dominant normal allele in the heterozygous condition and is not seen in the phenotype.
A haploid organism has only one set of chromosomes and therefore only one allele of each gene.
There is no second allele to mask the mutant one, so every mutation, whether dominant or recessive, is expressed immediately in the phenotype.
This makes the detection of mutations easy, which is why haploids (for example Neurospora, and haploid plants raised by anther culture) are preferred for mutation studies.
Haploids are not more abundant, not reproductively more stable, and mutagens do not penetrate them more effectively.
So the reason is that all mutations, whether dominant or recessive, are expressed in haploids.
A diploid organism has two alleles for every gene, so a recessive mutation is masked by the dominant normal allele in the heterozygous condition and is not seen in the phenotype.
A haploid organism has only one set of chromosomes and therefore only one allele of each gene.
There is no second allele to mask the mutant one, so every mutation, whether dominant or recessive, is expressed immediately in the phenotype.
This makes the detection of mutations easy, which is why haploids (for example Neurospora, and haploid plants raised by anther culture) are preferred for mutation studies.
Haploids are not more abundant, not reproductively more stable, and mutagens do not penetrate them more effectively.
So the reason is that all mutations, whether dominant or recessive, are expressed in haploids.