Question

The study of Neurospora mutants grown on various supplemented media enabled researchers to identify single genes involved in the arginine synthesis pathway. Why was Neurospora a better model organism than a human cell line for this study? O a All Neurospora alleles are expressed phenotypically b. Arginine is an essential amino acid in human cells O The arginine synthesis pathway is less complex in Neurospora, Od. Neurospora DNA is more sensitive to X rays than human DNA. Oe. All human alleles are expressed phenotypically

Answer 1

All neurospora alleles are expressed phenotypically.

Neurospora species are all haploids, spending most of their life cycles in the haploid state. Haploids are able to express both recessive and dominant alleles/ mutations because there is only one allele for each gene in the individual. Hybrid is an organism containing two different alleles or individual containing both dominant and recessive genes of an allelic pair.

There for whatever mutation is given, neurospora express the allele which makes it easier to study single gene functions.