This question involves a single gene coding for fur color in guinea pig. Black fur (B) is dominant over white fur (b). This means that, as stated in the question, if a black fur parent (BB) is crossed with a white fur parent (bb), a 100% heterozygous offspring (Bb) with black fur will result.

If two heterozygous guinea pigs are crossed i.e. Bb × Bb, the following gametes will be produced by each heterozygous parent:

Bb = B and b

Using these gametes in a punnet square (see attached image), offsprings with the following genotypic ratio will be produced:

1 BB : 2 Bb : 1 bb

BB and Bb = black fur guinea pigs

bb = white fur guinea pigs

3 0

2 years ago

Why is the mixing of fresh water and salt water in the bay important?

Setler [38]

Answer:

When the salt water is mixed with fresh water,it is called brakish water which have the salinity 0.5 to 35 ppt.

Explanation:

The mixing of fresh and salt water is important for aquatic organisms.

The catadromous fish born in marine habitat but they spend their rest of life in the fresh water where growing and maturation takes place.

Ex- Eel is the common example of catadromous fish.

Like wise,

Anadromous fish born in fresh water and spends their life in the sea and return to fresh water for spawning.

For example Salmon, smelt, shad, are common examples.

Thus mixing of water is important for breeding and growing of these fishes.

More over, the brakish water contain world's most diversified life forms.

7 0

2 years ago

Which scientist confirmed that all cells must come from pre-existing cells?​

Which scientist confirmed that all cells must come from pre-existing cells?