Question

there are two types of alleles. an allele that masks another is the □ allele. the one that is masked is called the □ allele.
an organism that has the same alleles for a particular trait is □.
an organism that has different alleles for a particular trait is □.
done

Explanation:

1. For the first blank: In genetics (a subfield of Biology, which is under Natural Science), a dominant allele masks the expression of another allele. So the first blank is "dominant".
2. For the second blank: The allele that gets masked by the dominant allele is called the recessive allele. So the second blank is "recessive".
3. For the third blank: An organism with the same alleles for a trait is homozygous (e.g., AA or aa). So the third blank is "homozygous".
4. For the fourth blank: An organism with different alleles for a trait is heterozygous (e.g., Aa). So the fourth blank is "heterozygous".

Answer:

1. dominant
2. recessive
3. homozygous
4. heterozygous