Question

A pea plant that is homozygous for inflated pods and heterozygous for round seeds is crossed with a plant that is heterozygous for inflated pods and homozygous for wrinkled seeds. This cross would produce a 4:12, or 1:3, phenotypic ratio. True False

Answer 1

inflated pods: BB
round seeds : Bb
inflated pods: Bb
wrinkled seeds BB

Can you figure it out with that information?

Answer 2

No, I lost my book and am gettng a new one, but I don't have any idea what the answer is.....when I get my book I will catch up, but I have to submit my quiz today.

Answer 3

Ok I'll help you out

Answer 4

thank you!!

Answer 5

Both of the inflated pods are BB so they will pass on to the new plant. Wrinkled seeds are Bb and round seeds are Bb so there is a 50/50 chance of the new plants having either wrinkled seeds or round seeds.

Answer 6

OOPS I read that wrong, please ignore that!!

Answer 7

Ok so inflated pods are BB in one plants and Bb in the other..which gives us a pretty good chance having inflated pods in the new plant. Wrinkled seeds have a higher chance of showing up, because they are BB unlike round seed's Bb.

Answer 8

Now let me try to figure out the phenotypic ratio.

Answer 9

okay thank you so much!

Answer 10

I'm not sure if this is too confusing, but it shows the possible outcomes.

Answer 11

Now I'm looking for the ratio

Answer 12

this makes so much more sense now!

Answer 13

Can you find the ratio on your own?

Answer 14

i dont know how i cant wait to get my book

Answer 15

Ok give me a sec then, I haven't done this in a while lol

Answer 16

lol no prob thanks :)

Answer 17

Hm ok, I'm going to go ahead and say that the answer would be false. Our findings do not come up with a 1:3 ratio.

Answer 18

okay thank you so much! i have another question on this could you answer that too?

Answer 19

Sure, I'll try! :)

Answer 20

okay so here is the question:
If the offspring of a dihybrid cross have a 9:3:3:1 phenotypic ratio, what must be true of the parents’ genotypes?

a.Both parents are heterozygous for only one trait.
b.Both parents express the recessive trait.
c.Both parents are heterozygous for both traits.
d.Both parents express the dominant trait.

I feel like all the answers are wrong! thanks again!!

Answer 21

idk why the question marks show up in the diamonds but they dont stand for anything

Answer 22

Ok, so here's some information on dihybrid crosses: http://en.wikipedia.org/wiki/Dihybrid_cross

Answer 23

So let me review your given answers

Answer 24

The answer would be A both parents are heterozygous for only one trait.

Answer 25

Oh thank you I think i get it now!!

Answer 26

Your welcome! I'm sure you'll do great when your text book arrives :)

Answer 27

If you have any other questions, feel free to ask me.