<em><u>An allele refers to an alternative form of a gene. In other words it is one of the form of a gene.</u></em>
<em><u>A gene may have two alleles, where one of the allele is a dominant allele and the other is a recessive allele. </u></em>
A homozygous organisms may be dominant or recessive, a homozygous recessive contains two recessive alleles while a homozygous dominant contains two dominant alleles.
A heterozygous organisms contain one dominant allele and one recessive allele.
2. Answer;
B) Alleles
Explanation;
<em><u>According to Mendel genes are inherited in pairs of alleles that behave in a dominant and recessive pattern. </u></em>
<em><u>Alleles are alternative forms of a gene. </u></em>
A gene may have two alleles, where one of the allele is a dominant allele and the other is a recessive allele.
A homozygous organisms may be dominant or recessive, a homozygous recessive contains two recessive alleles while a homozygous dominant contains two dominant alleles.