Question

HELP!
A snapdragon pure-breeding for red flowers was bred with one that was pure-breeding for white flowers. The F1 generation had only pink flowers. A plant with red flowers was crossed with one with pink flowers. What will be the phenotypic ratio of the offspring?
A) 1 red: 1 White
B) 1 red: 1 pink
c) 1 red: 2 pink: 1 white
D) 1 red: 1 pink: 2 white

Answer 1

2) Red-green colour blindness is inherited as an X-linked recessive trait. A woman whose father is colour blind, but herself has normal vision, marries a colour blind man. If they have a son, what is the probability that he will be colour blind?
A) 0
B) 0.25
C) 0.50
D) 0.75

Answer 2

I got B for both :/ But, Are they correct?

Answer 3

Hey there @Rusty143 !

Answer 4

Hiiiii @Abhisar

Answer 5

Let's check your question one by one ;)

Answer 6

#1

They say, they are crossing between a true Red and a Pink. Can you tell me what should be the genotype of pink flower?

Answer 7

Yeah. \[C ^{R} C ^{W}\]

Answer 8

Yes, we denote it simply as Rr. It is the case of incomplete dominance.

Answer 9

Now we have to make a cross between Rr and RR

Answer 10

ohhh. So, 2 red and 2 pink.

Answer 11

Which is the same as 1Red: 1 pink?

Answer 12

Yes, and that gives you a ratio of 1:1

Answer 13

Yay,so B. Thank God. And you, of course.

Answer 14

:D

Let's move on to next one ..

Answer 15

Okay! Proceed.

Answer 16

What will be the genotype of the female ?

Answer 17

\[X ^{N} X ^{C}\] She's a carrier?

Answer 18

Yes.....and that of his husband will be \(\sf X^CY\)

Answer 19

Now we need to draw a cross between \(\sf X^cX^N\) and \(\sf X^CY\)



Those inside the circle will be male.