One allele is dominant while other serves as recessive allele.
Explanation:
Two alleles of a trait exhibit dominant-recessive behavior. The allele that can express itself in both homozygous and heterozygous condition is called "dominant" allele. On the other hand, the allele which is expressed only in homozygous genotype is termed as a recessive allele.
Example: T and t are the alleles for plant height. Both "TT" and "Tt" genotype give "tall" plants while "tt" genotype gives dwarf plants.
Since the presence of allele "t" in the genotype "Tt" is masked by "T" allele, the allele "T" is dominant over "t" allele.
There is Homozygous Dominant which is two dominant alleles, then Homozygous Recessive which is two alleles that will only be shown if it is paired with heterozygous which is a Dominant and recessive. I hope that makes sense, sorry i’m bad at explaining but if it doesn’t I can try and explain it again.
Yes, it was possible for humans to be similarly genetically modified because human also posses myostatin protein that regulates the growth of muscles and prevent muscle cells to grow very large. So by using genetic engineering technique, modification also occurs in the body of human if this protein is removed from the human body so the human being has also a muscular body.
