Genetics 101: Human Eye Color: Inheritance and Variation | Lecture 1 #genetics #heredity #variation
Channel: G5 Biology
Date: 30/01/2024

Exploring Genetic Diversity: Unraveling Traits and Variation
 #genetics #heredity #variations 
What is Genetics?
Genetics is the branch of biology that studies the heredity and variance of a trait within the population and the inheritance of those traits from parents to the offspring. It involves the study of genes, DNA, and chromosomes, and how they contribute to the development, variation, and inheritance of traits.
What is a Trait?
In Genetics, traits are the specific characteristics of an individual. Traits can be determined by the DNA or genes we have, by the environment, and by the interaction of both the genes and the environment.
For example- hair color, eye color, height, shoe size
Let’s look at an example of eye color
One gene encodes eye color. One allele is inherited from dad (bb) and the other from mom (BB). Here, one allele is either brown eye or blue eye.
If your dad has blue eye color and your mom has brown eye color, then the segregation will be a little complex. You might have brown eye color, your brother might have blue eye color and your sister might have brown eye color. Let’s explore it genetically.
If your dad has blue eye color (bb) and your mom has brown eye color (either BB or Bb)
What is inheritance?
Inheritance is the genetic process in which the traits from parents are passed to their offspring through the transmission of genetic information. The genetic information is carried by DNA, which is organized into structures called chromosomes. 
In the previous example, the blue eye color from dad is passed to your brother and this is called inheritance.
What is Variance?
Variance is the diversity of a specific trait that is seen within a population. Variance can be influenced by genetic factors, environmental factors, and the interaction between genes and the environment.
Variance in genetics refers to the extent of variation or diversity observed in a particular trait within a population. It represents the differences in the expression of traits among individuals. Variance can be influenced by genetic factors, environmental factors, and the interaction between genes and the environment.
#genetics #traits #trait #genes #gene #genome #biology #dna #highschoolbiology #highschoolgenetics #g5biology #sarojparajuli #variance #inheritance