Answer:
<em>The correct option is 'this guinea pig could be homozygous dominant (HH) or heterozygous (Hh).'</em>
Explanation:
When both the alleles of a gene are the same then they are termed to be homozygous. If a gene possesses two different types of alleles then it is termed as heterozygous.
A dominant allele is the one which can suppress the effect of a recessive allele. A recessive allele is the one which gets masked by the dominant allele.
For a dominant trait to occur, an organism can either be homozygous dominant for that trait or it can be heterozygous for the trait.
The incorrect among the choices is "<span>direct signaling involves the activation of g proteins"
This is incorrect because direct signaling does not involve the activation of g proteins rather it involves the activation of ion channels resulting to either an excitation reaction (depolarization of the membrane) or an inhibition reaction (hyperpolarization of the membrane); and this will ultimately affect the action of the organ the nerve is innervating.</span>
