if there were 8 puppies in a litter, how many would have dark fur and how many would have yellow?

Question

science thing i need to this for 6 litter too

im working on some science homework...it's creating punnett squares for labrador retrievers with the combination of dd (yellow fur) and Dd (dark fur) i need to know in a litter of 6 puppies how many would have dark and how many yellow. thanks

Answer 1

Lot of answers are asking which is dominant? In this case it doesn't matter. Mar almost has it right. For your Punnett Square Dd X dd -->Dd +Dd + dd +dd. So the ratio would be 2:2 or reduced to 1:1. So for every yellow one there would be a dark one no matter which gene is dominant. So the answer to your question would be 4 and 4 for a litter of 8 and 3 and 3 for a litter of 6.

You understand these ratios apply for large numbers. They are the odds that the offspring will be dark or yellow but in reality, in one litter the numbers could vary. For example the odds are 1:1 that a baby will be a girl or boy but we all know families with 3 girls and no boys or 3 boys and 1 girl, etc.

Answer 2

What is the genetic makeup of the mother and the father? (Purebred dark, purebred yellow, or hybrid dark/yellow? I need to know for each one.) And which color is dominant, and which is recessive?
I need this info to answer the question.
OK, so I guess Yellow is d (recessive) and dark is D (dominant.)
One parent is dd (purebred yellow) and the other is Dd (hybrid brown/yellow, brown color because brown is dominant.)
On average, each litter would have 1/4 Dd and 3/4 dd.
I.e. one fourth brown and three fourths yellow.
So in a litter of 8 pups, the average would be 6 yellow and 2 brown (hybrid brown/yellow.)
Out of six pups, on average, 1/4 X6 =1.5 brown
3/4 X = 6 = 4.5 yellow
It is not possible to predict exactly how many pups of each litter would be dd or Dd, since this is a matter of probability, like flipping coins.

Answer 3

if the yellow (dd) color is the recessive gene and the black color is the dominant gene (Dd) then;
Dd x dd = would yield --> Dd, dd, dd, dd which means 1/4 of the offspring would be black and 3/4 would be yellow. so if there are 6 puppies then more or less 2 puppies would be black and 4 would be yellow... :)

Answer 4

It's impossible to know.
There are many variables.
Which is dark, the female or the male??
What breed are they??
I mean ...you're not mixing paint.
My pure bred white poodle had
9 pure black puppies.
You would need to know the colors
of the parents of the two dogs, that
are to be bred.
If you are just guessing, then you
could say 5 black and 3 yellow.
Or probably any combination .

Answer 5

I've always only seen one with yellow but I haven't seen them all. It's like asking about the weather with so little information to start with.
Teri

Answer 6

I would think it would depend on the fur of the parents and which fur was the dominate gene.

Answer 7

i would say 4&4

Answer 8

I don't think there is a certain answer. golden retreivers would be all yellow.

Answer 9

it depends what the dominant trait is