The locations of six deletions were mapped to the Drosophila chromosome as shown
ID: 149845 • Letter: T
Question
The locations of six deletions were mapped to the Drosophila chromosome as shown below. Recessive mutations (a, b, c, d, e, f, and g) found in seven genes are known to be located in the same region as the deletions, but the gene order on the chromosome is not known. Multiple crosses are performed in which flies homozygous for one of the recessive mutations are crossed with flies that are homozygous for one of the deletion mutations. The phenotypes observed in the heterozygous offspring are summarized in the table The symbol m represents a mutant phenotype and a plus sign (+) represents the wild type phenotype Mutations a Deletion 1+ Deletion 2m Deletion 3+ Deletion 4 m Deletion 5+ Deletion 6+ hich phenotype would be expressed if the progeny has a recessive mutation on one chromosome and the same locus is deleted on the homologous chromosome? O mutant O intermediate O wild type Continued below.Explanation / Answer
The answer is intermediate because by having one recessive mutation on one chromosome leads to the fact mutation binds itself and doesnt lead to any deletions. As a result it is neither weak(mutant) and not wild either because there is nothing deleted not inserted .As a result it remains to be intermediate without being affected at all.
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