What is the frequency of gray, sleek testcross progeny?
What is the frequency of gray, friendly testcross progeny?
What is the frequency of black, friendly testcross progeny?
What is the frequency of black, pudgy, mean testcross progeny?
What is the frequency of gray, pudgy, friendly testcross progeny?
What is the frequency of gray, sleek, mean testcross progeny?
What is the frequency of pudgy, friendly testcross progeny?
What is the frequency of pudgy, mean testcross progeny?
Coefficient of coincidence is given by
The observed frequency of double recombinant/ expected frequency of double recombinant
given that COC = 0.8
Map distance between color and body type gene is 10cM
Map distance between body type and disposition is 5cM
expected frequency of double recombinant is given by
Map distance between color and body type /100 * map distance body type and disposition/100
10/100 * 5/100 = 0.005
The observed frequency of double recombinant we need to find out
Coefficient of coincidence = the observed frequency of double recombinant/ expected frequency of double recombinant
0.80 = X /0.005
0.004
The observed frequency of double recombinant = sum of the
frequency of both the double recombination
Since nothing is given about the progeny numbers so we will take
the double recombinant frequency as half of the total double
recombinants that we got.
So the frequency will be 0.004/2 = 0.002
The frequency of gray, pudgy, friendly testcross progeny = 0.002
The frequency of black, sleek, mean testcross progeny 0.002
The distance between black and sleek is 10 cM.
A total number of the recombinant/total number of progeny = frequency of recombinant.
The frequency of recombination between black and sleek will be a sum of frequencies of gray, pudgy, friendly testcross progeny, black, sleek, mean testcross progeny, Black sleek and friendly progeny and gray, pudgy and mean progeny
Linkage distance = total number of recombinant * 100 / total number of progeny
10 = Recombination frequency between black and sleek* 100
Recombination frequency between black and sleek = 10/100 =
0.1
0.1 = sum of gray, pudgy, friendly testcross progeny, black, sleek, mean testcross progeny, Black sleek and friendly progeny and gray, pudgy and mean progeny
0.1 = 0.002 + 0.002 = Frequency of Black sleek and friendly progeny and frequency of gray, pudgy and mean progeny
0.1- 0.004 = 0.096
Frequency of Black sleek and friendly progeny = 0.096/2 =
0.048
frequency of gray, pudgy and mean progeny =0.096/2 = 0.048
The distance between Friendly and sleek is 5 cM.
A total number of the recombinant/total number of progeny = frequency of recombinant.
The frequency of recombination between friendly and sleek will be a sum of frequencies of gray, pudgy, friendly testcross progeny, black, sleek, mean testcross progeny, gray sleek and mean progeny and black, pudgy and friendly progeny
Linkage distance = total number of recombinant * 100 / total number of progeny
5 = Recombination frequency between black and sleek* 100
Recombination frequency between black and sleek = 5/100 =
0.05
0.05= sum of gray, pudgy, friendly testcross progeny, black sleek,
mean testcross progeny, gray sleek and mean progeny and black,
pudgy and friendly progeny
0.05= 0.002 + 0.002 + Frequency of Black sleek and friendly progeny and frequency of gray, pudgy and mean progeny
0.05 - 0.004 = 0.0.046
Frequency of Black sleek and friendly progeny = 0.046 / 2 =0.023
Frequency of gray, pudgy and mean progeny = 0.046 / 2 =0.023
As we know the frequency is always equal to one. So subtract 1 from all the frequencies that we have got we can get the parent frequency.
1 – 0.046+0.004+0.096
= 1 – 0.146
= 0.854
Frequency of Gray sleek pudgy = 0.854/2 = 0.427
Frequency of black pudgy and mean = 0.854/2 = 0.427
The frequency of gray, pudgy, friendly testcross progeny =
0.048
The frequency of black, sleek, mean testcross progeny 0.048
The frequency of gray, pudgy, friendly testcross progeny = 0.002
The frequency of black, sleek, mean testcross progeny 0.002
Frequency of Black sleek and friendly progeny = 0.023
Frequency of gray, pudgy and mean progeny = 0.023
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What is the frequency of gray, sleek testcross progeny? What is the frequency of gray, friendly testcross progeny? What...
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