Waxy endosperm (wx), shrunken endosperm (sh) and yellow seedling (v) are encoded by three recessive genes in corn that are linked on chromosome 5. A corn plant homozygous for all three recessive alleles is crossed with a plant homozygous for all the dominant alleles. The resulting F1 are then crossed with a plant homozygous for the recessive alleles in a three point test cross. The progeny of the test cross are: wx sh WX SH V WX SH V Wx sh WX sh V SH v SH V V 87 1,515 94 WX 1,531 3,479 292 WX Wx sh v 3,478 280 a. Determine the order of the genes on the chromosome. b. Calculate the map distances between the genes. c. Determine the cc and I.
Waxy endosperm (wx), shrunken endosperm (sh) and yellow seedling (v) are encoded by three recessive genes in corn that are linked on chromosome 5. A corn plant homozygous for all three recessive alleles is crossed with a plant homozygous for all the dominant alleles. The resulting F1 are then crossed with a plant homozygous for the recessive alleles in a three point test cross. The progeny of the test cross are: wx sh WX SH V WX SH V Wx sh WX sh V SH v SH V V 87 1,515 94 WX 1,531 3,479 292 WX Wx sh v 3,478 280 a. Determine the order of the genes on the chromosome. b. Calculate the map distances between the genes. c. Determine the cc and I.
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Transcribed Image Text:Waxy endosperm (wx), shrunken endosperm (sh) and yellow seedling (v) are
encoded by three recessive genes in corn that are linked on chromosome 5. A
corn plant homozygous for all three recessive alleles is crossed with a plant
homozygous for all the dominant alleles. The resulting F1 are then crossed with
a plant homozygous for the recessive alleles in a three point test cross. The
progeny of the test cross are:
wx sh
WX SH V
WX SH V
Wx sh
WX sh V
SH v
SH V
V
87
1,515
94
WX
1,531
3,479
292
WX
Wx sh v
3,478
280
a. Determine the order of the genes on the chromosome.
b. Calculate the map distances between the genes.
c. Determine the cc and I.
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