Construct a chromosome map for genes a, b, c and d using the following crossing over data: a to d= 25%; a to b= 20%; a to b= 30%; c to d= 15%; b to d= 5%; b to c= 20%

Which statement best describes the relationship between an allele and a gene? question 1 options: an allele is a variation of a gene that can be expressed as a phenotype. an allele is the part of a gene that attaches to messenger rna molecules. an allele is a segment of a dna molecule that controls replication of a gene.

Dna and rna share a number of similarities, but they also differ in certain aspects of their structure. wich nitrogenous base is found in rna but is not found in dna

14. which of the following codons code for threonine? a. ucg b. ugu c. cga d. aca