Biology Inheritance Principle part 16 (Mendel's Experiment ; Dihybrid cross) class 12 XII

TL;DR

Mendel studied the inheritance of two traits by performing dihybrid crosses, where he observed the dominance of certain traits and the reappearance of hidden traits in later generations.

Transcript

Hello friends this video on principles of inheritance part 16 is brought to you by exam.com no more fear from exam so now we will talk about inheritance of two genes now in the last section we discussed Crossing between parents that differ in one trait for example we uh we took plants which are tall or dwarf so just one tra was considered and that ... Read More

Key Insights

• 😵 Dihybrid crosses involve the study of the inheritance of two traits.
• 😑 In the F1 generation, only the dominant traits are expressed, while the recessive traits remain hidden.
• ❓ In the F2 generation, a variety of combinations of traits can occur.
• 🌱 The traits of seed shape and seed color segregate independently during gamete formation.

Questions & Answers

Q: What is a dihybrid cross?

A dihybrid cross is a genetic cross involving two traits, where individual plants or organisms that differ in both traits are crossed.

Q: What were the two traits Mendel studied in his dihybrid crosses?

Mendel studied the traits of seed shape (round or wrinkled) and seed color (yellow or green) in his dihybrid crosses.

Q: How did Mendel determine the dominance of certain traits?

Mendel observed that in the F1 generation of his dihybrid crosses, only the dominant traits (round shape and yellow color) were expressed, while the recessive traits (wrinkled shape and green color) remained hidden.

Q: What did Mendel observe in the F2 generation of his dihybrid crosses?

In the F2 generation, Mendel observed a variety of combinations, including round and yellow seeds, round and green seeds, wrinkled and yellow seeds, and wrinkled and green seeds.

Summary & Key Takeaways

• Mendel conducted experiments with pea plants to study the inheritance of two traits: seed shape (round or wrinkled) and seed color (yellow or green).

• In the F1 generation, all the seeds produced were round and yellow, demonstrating the dominance of these traits.

• In the F2 generation, a variety of combinations were observed, including the reappearance of hidden traits.