Changes in Chromosome Structure and Number 20. Six bands in a salivary gland chromosome of drosophila are shown here along with the extent of five deletions (Del 1 to Del 5):³ -------1------2-----3-----4----------5----------6---- Del 1 Del 2 Del 3 Del 4 Del 5 Recessive alleles a, b, c, d, e, and fare known to be in this region, but their order is unknown. When wild-type individuals with the deletions are testcrossed to individuals recessive for all six genes, the following results are obtained (a minus sign indicates the wild-type allele is masking the expression of the recessive mutant allele, a plus sign indicates the recessive allele is being expressed). Use these data to infer which salivary band corresponds to each gene. b с a + Del 1 Del 2 + Del 3 + Del 4 Del 5 + ' I ++++ 1 d ++ + e +++ +

Changes in Chromosome Structure and Number 20. Six bands in a salivary gland chromosome of drosophila are shown here along with the extent of five deletions (Del 1 to Del 5):³ -------1------2-----3-----4----------5----------6---- Del 1 Del 2 Del 3 Del 4 Del 5 Recessive alleles a, b, c, d, e, and fare known to be in this region, but their order is unknown. When wild-type individuals with the deletions are testcrossed to individuals recessive for all six genes, the following results are obtained (a minus sign indicates the wild-type allele is masking the expression of the recessive mutant allele, a plus sign indicates the recessive allele is being expressed). Use these data to infer which salivary band corresponds to each gene. b с a + Del 1 Del 2 + Del 3 + Del 4 Del 5 + ' I ++++ 1 d ++ + e +++ +

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter7: Development And Sex Determination

Section: Chapter Questions

Problem 18QP: Equalizing the Expression of X Chromosome Genes in Males and Females Males have only one X...

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