If a homozygous black guinea pig is crossed with a homozygous white guinea pig what is the probability that an offspring will have black fur?

Answer 1

100% because BB is dominant over bb and all the crosses make Bb

Answer 2

depends if the black fur gene is dominant..

if it is...

then yu would cross BB with bb making all heterozygous genotypes(Bb)

therefore, having all possible offspring with black fur

so theres a 100% probability of offspring with black fur(:

Answer 3

Homozygous means both alleles are the same. Hence, crossing a homozygous brown (say BB) with a homozygous white (say ww) will produce heterozygous Bw offspring--there's no alternative to this. Since brown is dominant, all the offspring will be brown.

It gets fun in the next generation. If you mate a Bw male with a Bw female from another set of parents, you have 25 percent chance of BB, 50 percent of Bw and 25 percent of ww--or 75 percent chance the offspring will be brown. You get a 50-percent chance of brown ones if you cross one of these Bw guinea pigs with a ww guinea pig--we know one side WILL contribute a white gene, so you'll get either Bw or ww offspring.

Answer 4

None. Chickens have feathers not fur.

Now to color. The male usually determines color so without that information it is hard to answer with any authority.

In most crosses if the male is black and the hen is white you will get some black chicks and all will have white/black variations.

If the male is white and the hen is black you will get some all white with others showing black and white.

If the breed is Leghorn, even if the rooster is black you will get mostly white chicks with some throwbacks in red and buff.

Answer 5

100% because BB is dominant over bb and all the crosses make Bb

Answer 6

If Bb also gives the guinea pigs black fur then 3 in 4 or 75% of them will be black. If only BB does then only 1 in 4 or 25% will be born with black fur.

Answer 7

The chance is 25%.