Heredity
Chapter Name : Heredity And Evolution |
Sub Topic Code : 103_10_09_02_04 |
Topic Name : Heredity |
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Sub Topic Name : How Do These Traits Get Expressed? |
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Introduction
Progeny gets its traits in a pair. In this pair, one trait is from father and one from mother. These traits get transferred from parents to progeny in the form of chromosomes.
Pre-Requisites:
Understanding of rules of inheritance and Mendel’s experiments.
Activity:
Cross a TT plant with a tt plant virtually in your notebook and work out the gene combinations of the first progeny F1. See which traits are inherited and exhibited in the first progeny.
Real Life Question:
Can a human baby be totally alike either of her parents i.e. totally like mother or totally like father?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Gene Trait Chromosome | Section of DNA that provides information for the formation of a protein. Any feature, inherited at birth or acquired later. Pieces on DNA. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Read Mendel’s experiment. Try to work out the rules yourself. | Understanding the rules of inheritance. |
Places to visit :
Biology Laboratory
Practical examples around us
| Examples | Explainations |
|---|---|
| You get one chromosome containing one trait from each of your parents. Hence if your mother is short, there are still chances that you can be tall if your father is tall. |
What you learn in Theory:
Each progeny cell has two copies of chromosomes, one each from the male and female parents.
What you learn in Practice:
How progeny of sexually reproducing organisms have traits from both the parents.