You visited us 3 times! Enjoying our articles? Unlock Full Access!

Significance of Crossing Over

Suppose a and...

Question

Suppose a and b gene shows incomplete linkage and shows $40 %$ recombination then find out the ratio of gamete in F generation by crossing ++/++ gene containing plant with ab/ab gene containing plant:

+ + 20 % : a b 20 % : + b 20 % : a + 40 %

No worries! We‘ve got your back. Try BYJU‘S free classes today!

+ + 50 % : a b 50 %

No worries! We‘ve got your back. Try BYJU‘S free classes today!

+ + 25 % : a b 25 % : b 25 % : a + 25 %

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

+ + 30 % : a b 30 % : + b 20 % : a + 20 %

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C $+ + 25 % : a b 25 % : b 25 % : a + 25 %$
Incomplete linkage is mainly caused due to segregation of chromosomes in F2 generation.
Sweet pea is an example of such recombination
It should be always less than parental one
In F2 generation it can be more

Suggest Corrections

Similar questions

20 %

+

+ / +

+

\times

a

b

30

+ + / + +

a b / a b

Two linked genes a and b show 30%recombination.The individual of a dihybrid cross ++/++ ab/ab shall produce gametes as:

1. ++80 : ab 20

2. ++40 : ab 40 : a10 : b 10

3. ++35 : ab 35 : a15 : +b15

4.++50: ab

Ans is (3)

Can I get the solution how to approach this questions

F_{1}

40 %

(a B)

A a B b

Join BYJU'S Learning Program