In corn long ears (L) is dominant to short ears (l):glossy kernels (G) is domina
ID: 88657 • Letter: I
Question
In corn long ears (L) is dominant to short ears (l):glossy kernels (G) is dominant to opaque kernels (g), and high starch (S) is domimant to normal starch (s). A heterozygous plant with long ears, glossy kernels and high starch is crossed with a short eared plant with opaque kernels and normal starch. The following phenotypes are observed. Which genes are linked? (Gene name is based on the dominant trait.) Long and glossy are linked, starch is not linked to either. Starch and glossy are linked, long is not linked to either. Long and starch are linked, glossy is not linked to either. All three genes are linked. All three genes are assorting independently.Explanation / Answer
The answer is Long and satch are linked, glossy is not linked to etiher.
For explanation find the below explantion:
The steps involved in the problem is first need to group two of three characters
And the comparision of frequency.
If the ration fits to 1:1:1:1, which means those are showing independent assortment means two genes are present on different chromosomes.
If the ration is not fits to 1:1:1:1, which means those genes are showing linkage relationship means two genes are present on same chromosome.
Trait
Freequency
Long, opaque
(58+15)73
long, glossy
(55+13)68
short, glossy
(14+59)73
short, opaque
(16+53)69
The ratio almost equals to
1:1:1:1
Trait
Freequency
long, high starch
(58+55)113
long, normal starch
(15+13)28
short, high starch
(16+14)30
short, nomal starch'
(53+59)112
The ratio not equals to
1:1:1:1
Trait
Freequency
opaque, high starch
(58+16)74
opaque, normal starch'
(15+53)68
glossy, high starch
(14+55)69
glossy, nomal starch
(59+13)72
The ratio almost equals to
1:1:1:1
On the basis of the above data the traits ear length and starch character are linked.
Trait
Freequency
Long, opaque
(58+15)73
long, glossy
(55+13)68
short, glossy
(14+59)73
short, opaque
(16+53)69
The ratio almost equals to
1:1:1:1
Trait
Freequency
long, high starch
(58+55)113
long, normal starch
(15+13)28
short, high starch
(16+14)30
short, nomal starch'
(53+59)112
The ratio not equals to
1:1:1:1
Trait
Freequency
opaque, high starch
(58+16)74
opaque, normal starch'
(15+53)68
glossy, high starch
(14+55)69
glossy, nomal starch
(59+13)72
The ratio almost equals to
1:1:1:1
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