Dr. Van Nostrand is a researcher in a lab that studies nutria (a large aquatic rodent). He has identified three genes in the nutriagenome that all reside on the same chromosome. In nutria, Tufted tails (7) are dominant to non-tufted tails (t), brown coat color (B) isdominant to white coat color (b) and long whiskers (L) are dominant to short whiskers (/). To map these genes relative to each other, hemated tufted tail (7), brown coated (B), long whiskered (L) nutria that were heterozygous for all three traits with non-tufted tail (t), whitecoated (b), short whiskered (1) nutria that were homozygous for all three traits (i.e. he performed a test cross). The following numbersand types of offspring were obtained from this cross:PhenotypeTufted, brown coated, short whiskers (T, B. I)Non-tufted, white coated, long whiskers (t, b, L)Non-tufted, brown coated, short whiskers (t, B, I)Tufted, white coated, long whiskers (T, b, L)Tufted, white coated, short whiskers (T,b,I)Number500550151149195Non-tufted, brown coated, long whiskers (t, B, L)200Tufted, brown coated, long whiskers (T, B, L)2626Non-tufted, white coated, short whiskers (t, b, I)2929Total1800 Based on this data, which gene is in the middle?Give the distances in map units for each of the following gene pairs (please calculate your answer to the nearest hundreth of a mapunit):T-B=B-L=T-L=Calculate the Interference (please calculate to 2 decimal places)=

If two or more genes are located on the same chromosome then they are classified as linked genes. In…

Based on this data, which gene is in the middle? Give the distances in map units for each of the following gene pairs (please calculate your answer to the nearest hundreth of a map unit): T-B= B-L= T-L= Calculate the Interference (please calculate to 2 decimal places)

Based on this data, which gene is in the middle? Give the distances in map units for each of the following gene pairs (please calculate your answer to the nearest hundreth of a map unit): T-B= B-L= T-L= Calculate the Interference (please calculate to 2 decimal places)

Human Biology (MindTap Course List)

11th Edition

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cecie Starr, Beverly McMillan

Chapter20: Chromosomes And Human Genetics

Section: Chapter Questions

Problem 2CT: Human sex chromosomes are XX for females and XY for males. a. With respect to an X-linked gene, how...

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Concept explainers

Genome annotation

The technique of linking biological information to genome sequences is termed genome annotation. Gene annotation is the method of identifying gene locations and coding sections. It helps us understand what these genes are doing in the body through establishing structural characteristics and linking them to the actions of various proteins.

Question

Dr. Van Nostrand is a researcher in a lab that studies nutria (a large aquatic rodent). He has identified three genes in the nutria
genome that all reside on the same chromosome. In nutria, Tufted tails (7) are dominant to non-tufted tails (t), brown coat color (B) is
dominant to white coat color (b) and long whiskers (L) are dominant to short whiskers (/). To map these genes relative to each other, he
mated tufted tail (7), brown coated (B), long whiskered (L) nutria that were heterozygous for all three traits with non-tufted tail (t), white
coated (b), short whiskered (1) nutria that were homozygous for all three traits (i.e. he performed a test cross). The following numbers
and types of offspring were obtained from this cross:
Phenotype
Tufted, brown coated, short whiskers (T, B. I)
Non-tufted, white coated, long whiskers (t, b, L)
Non-tufted, brown coated, short whiskers (t, B, I)
Tufted, white coated, long whiskers (T, b, L)
Tufted, white coated, short whiskers (T,b,I)
Number
500
550
151
149
195
Non-tufted, brown coated, long whiskers (t, B, L)
200
Tufted, brown coated, long whiskers (T, B, L)
26
26
Non-tufted, white coated, short whiskers (t, b, I)
29
29
Total
1800

Based on this data, which gene is in the middle?
Give the distances in map units for each of the following gene pairs (please calculate your answer to the nearest hundreth of a map
unit):
T-B=
B-L=
T-L=
Calculate the Interference (please calculate to 2 decimal places)=

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