Respuesta :
The study of genes and inheritance is called genetics. There are two types of genes in a gene pair and these are recessive and dominant.
The correct answer to the question is option A that is Alleles.
What is Punnett square?
The symbolic representation of the crossing of genes is called Punnett square. It is discovered by Reginald C Punnett.
According to the question, the right answer is option A because it crosses the different traits of genes which are alleles.
For more information about the allele, refer to the link:-
https://brainly.in/question/9531558