Genetics question? In rabbits black hair is dominant over white. A black male rabbit whose mother ha

"In rabbits black hair is dominant over white. A black male rabbit whose mother had white hair is mated with a white female rabbit and have 8 babies.

A.) What is the probability that 3 of the offspring will be black %26amp; the other 5 white?

B.)What is the probability AT LEAST 5 will be white?"

I'm not sure how to go about solving this. My first idea was a branch diagram.

If you can solve this please do so and explain how it was done.

Genetics question? In rabbits black hair is dominant over white. A black male rabbit whose mother had...?

punnett square. the father of the children would be a heterogenous parent that would look like this Bb, where the mother of the children would be bb.

then u can solve the probability and percentage.

Genetics question? In rabbits black hair is dominant over white. A black male rabbit whose mother had...?

Well a punnet square will work for half of this and a pedigree for the other half.The male is heterozygous since his mother had the white hair. since white hair is your recessive gene the white female is homozygous white.

now you make a punnet square cross heterozygous male with a homozygous recessive female. Genotypic ratio is 1:1 and your Phenotypic ratio is 1:1 meaning out of four you will have two white offspring so out of eight you will have four.

I dont exactly get these questions but i hope i helped. If I'm wrong I'm sorry I'm still in high school biology.

Genetics question? In rabbits black hair is dominant over white. A black male rabbit whose mother had...?

It is actually a simple problem. A branch diagram may not be of help. There is a formula employed in solving this kind of problem. Have you heard of binomial theorem? I think that would be the best step in solving that problem. The formula is (n!/s!r!)(p^sxq^r). The n stands for the sample number, in that problem n = 8. s stands for the occurence of a certain trait like for example black hair. In that problem s = 3. r stands for the frequency of occurence of the another obsever trait for example white coat. In connection to your problem r = 5. p stands for the probability of the occuence of s. In that case since black is dominant p=.75. q stands for the probability of r , in that case q=.25. So if you will compute the probability of having 3 black and 5 white is 0.02307128.

The next problem is actually a slight modification. try to solve 4 separate solutions where r=5 s=3, r=6 s=2, r=7 s=1 and r=8. Then you get the sum. Good luck. Genetic problems are actually simple. You just need practice.

Genetics question? In rabbits black hair is dominant over white. A black male rabbit whose mother had...?

A little bit of all three look right. You need to use a Punnett square for the first part then use a probabability equation like mark did to solve the second half.

For the Punnett Sqare, take a sqare and divide it into four quarters. Above the first column put B standing for the dominant black gene for the male. In the second column, put a lower case b for the recessive white gene he got from his mother. Animals receive half their genes from the mother and half from the father. Since the animal is black, we know it has a B from the father and since white is recessive we know it has to have a b from the mother. So it's genetic code is Bb. For the female, she has two recessive genes otherwise she wouldn't be white. So to the left of each row put a lowercase b for each row. No match the letters together. You should have two Bb's and two bb's. That means the probability of a rabbit being black or white is 50/50. Then you use a binomial equation like Mark said. See the following link for an example:

http://www.mathwords.com/b/binomial_prob...

For simple calculation, use the following website:

http://faculty.vassar.edu/lowry/binomial...

Answer for A: ~0.28175

To Answer B: Add the the probabilities of 5 white, 6 white, 7 white, and 8 white together.