Chapter 19, Problem 18Q

Summary Introduction

A.

To explain: The mechanism by which flies with two different eye colors for example ruby and white can give rise to progeny that have brick-red eyes.

Concept introduction: Genes are DNA sequences or RNA sequence which results in functional products which are RNA and protein respectively which has their own function inside the cell. Allele is the modification of the gene. Alleles are of two types dominant and recessive. The genes are named based on the mutation they cause. Since the gene results in a white eye, it’s called as white gene and thereby white allele which produce eye colors are the variants of the white gene. Null alleles are those that do not carry any functional allele.

B.

Summary Introduction

To explain: The mutations of the eye color which are from the same genes and from different genes.

Concept introduction: Genes are DNA sequences or RNA sequence which results in functional products which are RNA and protein respectively which has their own function inside the cell. Allele is the modification of the gene. Alleles are of two types dominant and recessive. The genes are named based on the mutation they cause. Since the gene results in a white eye, it’s called as white gene and thereby white allele which produce eye colors are the variants of the white gene. Null alleles are those that do not carry any functional allele.

C.

Summary Introduction

To explain: The mechanism by which different alleles of the same gene give different eye colors.

Concept introduction: Genes are DNA sequences or RNA sequence which results in functional products which are RNA and protein respectively which has their own function inside the cell. Allele is the modification of the gene. Alleles are of two types dominant and recessive. The genes are named based on the mutation they cause. Since the gene results in a white eye, it’s called as white gene and thereby white allele which produce eye colors are the variants of the white gene. Null alleles are those that do not carry any functional allele.