contestada

Part 3: Crossing Tail-Feather Length and Feather Color
Cross a P generation, LlBb with llbb. Assume the following F1 generation:
LlBb: 480
Llbb: 20
llBb: 20
llbb: 480
(Score for Question 1: ___ of 2 points)
1. Which offspring are not the recombinant offspring in this cross?
Answer:
Type your answer here.
(Score for Question 2: ___ of 2 points)
2. How far apart are L and B?
Answer:
Type your answer here.

Respuesta :

Iqta

Q: 1. Which offspring are not the recombinant offspring in this cross?

It is mentioned in the question that we are crossing Tail-Feather Length and Feather Color with short feather length and recessive feather color organisms.

P1:                                           LlBb X llbb

Gametes:                              LB: Lb: lB: lb :      lb

Offspring:

  • LlBb: 480
  • Llbb: 20
  • llBb: 20  
  • llbb: 480

So as we see that perntal combinations are LlBb  and llbb which means 480 + 480 organisms are just like parents while Llbb: 20  and llBb: 20  (20 +20=40) are recombinants.

Answer: It means that number of recombinants are 40.

-------------------------------------------------------------------------------------------------------------

Q2:  How far apart are L and B?

To answer this question we will use a formula:

The distance between L and B = Total number of recombinant types/  total number of offspring X 100

It means that distance between L and B=  40/1000 X 100

                                                                  = 4

Answer: It means L and B are 4 units apart because they make up 4 % of the total recombinant types. you just saw how we did it.


Hope it help! :)


Otras preguntas