In the structure of the antibiotic mutaxanthene a, shown below, how many trigonal planar carbon atom(s) are there?

             15 (Fifteen) trigonal planar carbon atoms.

Explanation:

Geometry around Carbon atom is basically controlled by the type of hybridization it follows. Carbon atom gives three types of hybridizations as;

Sp³ Hybridization:

                            In this type carbon atom is involved in making four single bonds with other atoms. Hence, the geometry about sp³ hybridized Carbon is tetrahedral.

Sp² Hybridization:

                            In this type carbon atom is involved in making two single bonds and one double bond with other atoms. Hence, the geometry about sp² hybridized Carbon is trigonal planar.

Sp Hybridization:

                            In this type carbon atom is involved in making one single bond and one triple bond with other atoms. Hence, the geometry about sp hybridized Carbon is linear.

Result:

           In the structure of Metaxanthene there are 15 carbons (highlighted red) which are sp² hybridized. Therefore, there are 15 trigonal planar carbons in Metaxanthene.

the child will have heterozygous dominant chromosomes as characters of his father are dominant over the characters of his mother.

the child is heterozygous

thats a little if u want the answer just look it up on google thats what i do haha : )