Reading background information because it gives ideas from the author himself.
Tracheotomy refers to creating an opening in the neck in order to place a tube into a person's windpipe.
Monohybrid crosses only look at one genotype. Whereas dihybrid crosses look at two genotypes.
An example of a monohybrid cross would be AA x aa, where A represents the dominant allele, and its phenotype is the colour red, and a represents the recessive allele, and its phenotype is the colour white.
An example of a dihybrid cross would be SSYY x SsYy, where the letter S represents the size, dominant phenotype is large, recessive is small, and Y represents the colour, dominant phenotype is yellow, recessive is green.
The measurement of the force of gravity pulling down an object is called weight, which is basically what you see when you step on a scale.
