The genetic base of the shape of orchid is very complex.
Mendelian traits are described as simple traits determined by one gene. The different alleles of the gene contribute to the difference in the trait. This is true for some traits in plants, animals including humans and other organisms, but not for the shape of orchids.
The shape of orchid flowers is determined by the ABCDE group of genes that are responsible for the body plan in plants. These genes are the equivalent of HOX genes of animals.
The protein products of different genes of the ABCDE group interact with each other in complex ways creating different shapes of orchids.
Answer:
This question is from a case study which i went through to find the answer of the question. In the case study Albert suffered from a stroke in which his left side of the brain was affected. However, the symptoms were present in the right side of the body.
This actually happens when a person experiences stroke his symptoms are present only in single side of the body because of the rupture of the blood vessels in specific side.
As we know that when descending nerve tracts intersect each other, the right side of the body is controlled by left side of the brain and left side of the body is controlled by the right side of the brain.
Therefore, when the symptoms of Albert were localized in only right side, it was concluded that Albert had suffered the damage in right side of the brain.
Hope it helps!
Look up Dawrin's theory of evolution. Basically, fossil records show how life forms change over time through evolution.
