In fruit flies long wings are a dominant trait and short wings are recessive trait Two fruit flies that are heterozygous for the long wings trait mate the cross produces 180 offspring how many are we expected to have short wings

45.

Explanation:

Lets say

X= dominant, long wings

x= recessive, short wings

Using Punnett Squares

Xx = heterozygous

Alleles            X           x  

X                   XX         Xx

x                    Xx          xx

Out of 4, only 1 has both recessive short wings, so using the ratio 1/4 × 180 offsprings, 45 of them are expected to have short wings.

it would be rhyolitic hope this

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.