In pea plants, Tall plant height is dominant over short plant height. If there are 200 short plants in the f2 generation from a cross that followed Mendel’s methods.

In pea plants, Tall plant height is dominant over short plant height. If there are 200 short plants in the f2 generation from a cross that followed Mendel’s methods, About how many plants will be tall in that generation?

About 600 plants will be tall in that generation.

If tall plant height (T) is dominant over short plant height (t), then in the F2 generation from a cross between two heterozygous tall plants (Tt x Tt), according to Mendelian genetics, the phenotypic ratio would be 3:1 (3 tall plants to 1 short plant).

So, out of 200 short plants in the F2 generation, we would expect 3 times as many tall plants. Therefore, the number of tall plants would be:

3 x 200 = 600

So, about 600 plants will be tall in that generation.

Mendelian Genetics

Mendelian genetics, named after the Austrian monk Gregor Mendel, who is often regarded as the father of modern genetics, refers to the principles of inheritance of traits from parents to offspring. Mendel's work laid the foundation for the science of genetics.

Key principles of Mendelian genetics include:

1. Principle of Segregation: Mendel proposed that each individual has two alleles for each gene, one inherited from each parent. During gamete formation, these alleles segregate so that each gamete receives only one allele for each gene.

2. Principle of Independent Assortment: This principle states that alleles of different genes assort independently of one another during gamete formation, as long as the genes are located on different chromosomes.

3. Dominance and Recessiveness: Some alleles are dominant, meaning that their effects are observed when present in heterozygous individuals (having two different alleles for a particular trait), while others are recessive, only being expressed when two copies of the allele are present (in homozygous recessive individuals).

4. Genotype and Phenotype: The genotype refers to the genetic makeup of an individual, while the phenotype refers to the observable characteristics resulting from that genetic makeup.

These principles explain patterns of inheritance observed in traits such as flower color in pea plants, which Mendel famously studied. His experiments with pea plants involved controlled breeding and careful observation of traits across multiple generations, allowing him to deduce these fundamental principles of genetics.

Mendelian genetics serves as the basis for understanding inheritance patterns in higher organisms, including humans, and it provides a framework for more complex genetic studies and advancements in fields such as genetic engineering and biotechnology.