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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Question
![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-
-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
+
+
+
+
Del 1
Del 2
Del 3
Del 4
Del 5
a
+
+
+
d
+
+
e](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9a3ae1c8-051e-4079-962c-499964b6af7b%2F0cf89565-18ef-44e6-bc9e-7b706593ceca%2F7uemsu4_processed.jpeg&w=3840&q=75)
Transcribed Image Text: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-
-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
+
+
+
+
Del 1
Del 2
Del 3
Del 4
Del 5
a
+
+
+
d
+
+
e
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