Aheterozygote is an individual with:
a. a different paternal and maternal allele at a particular locus.
b. the same paternal and maternal allele at a particular locus.
c. a dominant allele.
d. a recessive allele.

a) a different paternal and maternal allele at a particular locus

Explanation:  Hetero-zygote are referred as the organisms that represent the two different alleles of a particular gene. It can have different  individual paternal and maternal allele from a gene.They have the nature of establishing alleles that among the two alleles, one of them has a dominant approach. Therefore the correct option for the given  statement in the question is option(a) .

answer: the answer is b

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.