Question
In: Biology
The following three recessive genes are found in corn: bt1, brittle endosperm. g117 glossy leaf and...
The following three recessive genes are found in corn: bt1, brittle endosperm. g117 glossy leaf and rgdl, ragged seedling. A trihybrid of unknown origin is testcrossed producing the following offsprings:
|
Brittle, glossy, ragged 357 Brittle glossy 74 Ragged 66 Glossy 79 |
Wildtype 343 Brittle ragged 61 Glossy ragged 11 Brittle 9 |
What are the genotypes and phenotypes of the original parents?
Diagram the linkage relationship in the F1.
Determine the gene order.
Calculate the amount of recombination observed between the genes and diagram the gene map.
Is there any crossover interference? If yes, how much inference is operative?
Solutions
gladiator answered 2 years agoRelated Solutions
Three recessive genes in dogs are linked on a chromosome. A dog heterozygous for all three...
Three recessive genes in dogs are linked on a chromosome. A dog
heterozygous for all three recessive alleles is crossed with
homozygous for all the recessive alleles in a three-point
testcross.
(a) Determine the order of these genes on the
chromosome and
(b) calculate the map distances between the
genes.
The progeny of the testcross are:
r T
W 324
R t
w 319
R t
W 880
r
T w 887
R T
W 2376
r t w 2365
r t
W 47
R
T w 41
Total 7,239
In a three-point testcross, it was found that the genetic map, for three, linked genes was:...
In a three-point testcross, it was found that the genetic map,
for three, linked genes was: A-30 mu-B-20mu-C A genetic cross was
performed and, the outcome was; that of 1000 progeny 1 double
recombinant was observed. How does this compare to what we have
expected? Explain this phenomenon.
In a three-point testcross, it was found that the genetic map for three linked genes was:...
In a three-point testcross, it was found that the genetic map
for three linked genes was: A-----30 m.u.------B------20
m.u----C.
A genetic cross was
performed and it the outcome was, that of 1000 progeny, 1 double
recombinant was observed. How does this compare to what we would
have expected? Interpret and explain this genetic phenomenon?
(5 marks)?
In a three-point testcross, it was found that the genetic map for three linked genes was:...
In a three-point testcross, it was found that the genetic map
for three linked genes was:
A-----30 m.u.------B------20 m.u.-----C.
A genetic cross was performed and it the outcome was, that of 1000
progeny, 1 double recombinant was observed. How
does this compare to what we would have expected? Interpret and
explain this genetic phenomenon?
Three genes with recessive mutant phenotypes are located on the same chromosome in maize: short stem...
Three genes with recessive mutant phenotypes are located on the
same chromosome in maize: short stem (ss), purple aleurone
(pr), and knotted leaf (kn). A plant with all
three mutant phenotypes is crossed with a true-breeding, wild-type
plant. Resulting F1 plants are then backcrossed to the parental
mutant line to produce the following progeny:
(7 points)
Short
Purple Knotted
Number
ss
+
kn
2342
+
pr
+
2297
ss
pr
kn
4095
+
+ ...
Are the pests parasites or predators? For each pest, Black cutworms, Corn Leaf Aphid, Thrips, Corn...
Are the pests parasites or predators? For each pest, Black
cutworms, Corn Leaf Aphid, Thrips, Corn Rootworm, Wireworms, Chinch
bugs and white Grub (this are pests that affect corn). Explain how
the parasite's or predator's mechanism of action differs from those
of the crop's other parasites or predators.
Answer the following questions using 300 words
What is the difference between dominant and recessive genes
What is the difference between dominant and recessive genes
You are studying recessive mutations of three autosomal, linked genes in guinea pigs: fur color (y,...
You are studying recessive mutations of three autosomal, linked
genes in guinea pigs: fur color (y, yellow);
fur texture (wv, wavy); ear size
(l, large). The data in columns A and B was obtained from
crosses of heterozygous F1 females with homozygous testcross males
(recessive for all three traits).
Column: A
B
C
D
E
F2 Phenotype
# Observed
Corresponding
Genotype
P or SCO or DCO
Genotype Written in Correct Order on
Homologs
yellow
310
ywv+l+
P...
Genetic analysis has shown that three recessive genes d (dwarf), e (enlarged trunk) and f (fine...
Genetic analysis has shown that three recessive genes d (dwarf),
e (enlarged trunk) and f (fine leaf) are all found on chromosome #1
of apple. When a plant that was heterozygous for each of these
markers was testcrossed, the following 1000 progenies were
obtained:
wild type- 130 (+++)
fine leaf- 19 (++f)
enlarged trunk- 2 (+e+)
enlarged trunk, fine leaf – 350 (+ef)
dwarf -362 (d++)
dwarf, fine leaf -1 (d+f)
dwarf, enlarged trunk -16 (de+)
dwarf, enlarged trunk, fine...
What is a ductile-to-brittle transition? What three factors can cause a metal to experience a ductile-to-brittle...
What is a ductile-to-brittle transition? What three factors can
cause a metal to experience a ductile-to-brittle transition?
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