Lesson Progress
0% Complete
Topic Content:
- Mendel’s First Law (Law of Segregation of Genes)
- Describe a monohybrid cross as explained by Mendel’s Law of segregation
What is Mendel’s First Law?
Mendel’s first law (Law of Segregation of Genes) states that when two organisms, homozygous (identical alleles) or heterozygous (two different alleles of a given gene), are crossed, the offspring will be hybrid (carry two different alleles) but will exhibit only the dominant trait. The trait that remains hidden is the recessive trait.
- The law of segregation can be demonstrated in a monohybrid cross, where a cross is made between purebred homozygous plants, e.g. one tall (TT) and one short (tt).
- Mendel grew tall plants for several generations and observed that the plants produced only tall plants, which means they bred true.
- Mendel then crossed tall plants with short plants. All the offspring were tall. These he called the first filial generation of F1.
- He then crossed the F1 plants, collected their seeds, and sowed them. He referred to the offspring as the second filial generation of F2.
You are viewing an excerpt of this Topic. Subscribe Now to get Full Access to ALL this Subject's Topics and Quizzes for this Term!
Click on the button "Subscribe Now" below for Full Access!
Subscribe Now
Note: If you have Already Subscribed and you are seeing this message, it means you are logged out. Please Log In using the Login Button Below to Carry on Studying!
Responses