The only way recessive alleles show is if
there are
1 dominant and 1 recessive allele
2 recessive, alleles

Two recessive cells

Explanation:

The dominant trait powers over the recessive trait so the dominant trait can not be there for the recessive to show. BB would result in a dominant trait being shown Bb would result in a dominant trait being shown bb however is the only way for the recessive trait to be expressed.

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )

the earth is thought to have been formed about 4.6 billion years ago by collisions from a cloud of hydrogen, helium, rock, ice and other materials. these were pulled together by gravity to form objects in and around earth like- asteroids and small early planets called planetesimals.

so, the best possible answer to this question will be option d- to harden materials to form different parts of earth’s layers