You cross stickleback fish from a fast-maturing population (strain 1) and a slower-maturing strain (strain 2), and then mate F1 fish with each other to produce a large F2 family. Each F2 fish is measured for the number of days to reproductive maturity and scored for DNA sequence polymorphisms (markers) scattered across all chromosomes. For 5 genetic markers on chromosome 2, you obtain the data shown in the table below. What do you conclude from these data? a b с Marker locus A B C D E d Mean days to maturity Strain 1 homozygote 21 20 18 20 22 Selected answer will be automatically saved. For keyboard navigation, press up/down arrow keys to select an answer. Heterozygote 23 21 23 22 21 Strain 2 homozygote 22 24 26 23 22 Markers B and C are in separate genes in which strain 1 alleles lead to earlier maturity. Strain 1 alleles in one or more genes near markers B and C lead to earlier maturity. Markers B and C are in separate genes in which strain 2 alleles lead to earlier maturity. Strain 2 alleles in one or more genes near markers B and C lead to earlier maturity. LOD score 0.94 3.23 4.29 1.82 0.61

Human Anatomy & Physiology (11th Edition)
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Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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You cross stickleback fish from a fast-maturing population (strain 1) and a slower-maturing strain (strain 2), and then mate F1 fish
with each other to produce a large F2 family. Each F2 fish is measured for the number of days to reproductive maturity and scored
for DNA sequence polymorphisms (markers) scattered across all chromosomes. For 5 genetic markers on chromosome 2, you
obtain the data shown in the table below.
What do you conclude from these data?
a
b
с
d
Marker
locus
A
B
C
e
DE
D
Selected answer will be automatically saved. For keyboard navigation, press up/down arrow keys to select an answer.
Mean days to maturity
Strain 1
homozygote
21
20
18
20
22
Heterozygote
23
21
23
22
21
Strain 2
homozygote
22
24
26
23
22
Markers B and C are in separate genes in which strain 1 alleles lead to earlier maturity.
Strain 1 alleles in one or more genes near markers B and C lead to earlier maturity.
Markers B and C are in separate genes in which strain 2 alleles lead to earlier maturity.
Strain 2 alleles in one or more genes near markers B and C lead to earlier maturity.
There is not a QTL affecting time to maturity on chromosome 2.
LOD
score
0.94
3.23
4.29
1.82
0.61
Transcribed Image Text:You cross stickleback fish from a fast-maturing population (strain 1) and a slower-maturing strain (strain 2), and then mate F1 fish with each other to produce a large F2 family. Each F2 fish is measured for the number of days to reproductive maturity and scored for DNA sequence polymorphisms (markers) scattered across all chromosomes. For 5 genetic markers on chromosome 2, you obtain the data shown in the table below. What do you conclude from these data? a b с d Marker locus A B C e DE D Selected answer will be automatically saved. For keyboard navigation, press up/down arrow keys to select an answer. Mean days to maturity Strain 1 homozygote 21 20 18 20 22 Heterozygote 23 21 23 22 21 Strain 2 homozygote 22 24 26 23 22 Markers B and C are in separate genes in which strain 1 alleles lead to earlier maturity. Strain 1 alleles in one or more genes near markers B and C lead to earlier maturity. Markers B and C are in separate genes in which strain 2 alleles lead to earlier maturity. Strain 2 alleles in one or more genes near markers B and C lead to earlier maturity. There is not a QTL affecting time to maturity on chromosome 2. LOD score 0.94 3.23 4.29 1.82 0.61
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