Question

Is the phenotype of an organism controlled by its genotype?

Answer 1

Yes. The phenotype is the actual appearance of an organism, whereas the genotype is the genes that organism is carrying.

Explanation:

Suppose a flower has two alleles for flower colour, red R and white r. Red is dominant over white.

There are three possible genotypes:
RR, homozygous dominant,
rr, homozygous recessive,
and Rr, heterozygous

but only two phenotypes:red and white.

Both RR and Rr produce red flowers, and only rr produces white.

Note: A phenotype can be affected by multiple genes. Few traits are coded for by only one gene.