All Entries in the "Biology" Category

Genetics: Dihybrid Cross and the Law of Independent Assortment

While performing monohybrid crosses and studying one trait at a time, Mendel observed that the expression of one trait seemed independent of other traits.  For example, a plant could have inflated or constricted pod regardless of whether or not it had yellow or green seeds.  The shape of pod did not seem to affect the [...]

Genetics: Genetics and the Laws of Probability

When calculating the expected result of any genetic cross, we utilize the laws of probability.  It is like flipping a coin for heads and tails.  Each time you flip a coin, the chance of heads to come up is ½ or 50%, and the chance of tails to come up is also ½ or 50%.  [...]

Taxonomy: Kingdom Animalia

Basic characteristics of Animals

Animals are the most advanced among all the kingdoms’ organisms.  They exhibit complex chemical organization, metabolic process, behavior, and life functions that make them different from all other life forms.

Genetics: The Punnett Square

In the early 1900’s, a geneticist by the name of Reginald Crundall Punnett introduced the Punnett square, a handy tool used to predict results in genetic crosses.

Genetics: Monohybrid Cross

A cross between a tall plant and a short one is an example of a monohybrid cross (one factor cross) because it involves only one trait.