Plant Genetics and Inheritance Concepts

Flor Alba Cante Molina, a natural sciences and environmental education graduate, explains an exercise on Mendel's laws. The exercise involves crossing tall and dwarf plants to determine the genotypes and phenotypes of the F1 and F2 generations. In the F1 generation, all plants are heterozygous with a dominant tall phenotype. In the F2 generation, the genotypic ratio is 25% homozygous dominant, 50% heterozygous, and 25% homozygous recessive, while the phenotypic ratio is 75% tall and 25% dwarf.

Who is the instructor of the tutorial?

• Flor Alba Cante Molina

• Carlos Sanchez

• Juan Perez

• Maria Garcia

What is the dominant trait in the plant cross exercise?

• Green leaves

• Tall stem

• Short stem

• Yellow flowers

What is the genotype of the tall plant in the F1 generation?

• aa

• AA

• Aa

• aA

What percentage of the F1 generation plants are heterozygous?

• 100%

• 50%

• 25%

• 0%

What is the phenotype of the F1 generation plants?

• All short

• All tall

• Half tall, half short

• Three tall, one short

What is the genotype ratio in the F2 generation?

• 3:1

• 1:1:2

• 2:1:1

• 1:2:1

How many plants in the F2 generation are homozygous dominant?

• 3

• 1

• 2

• 4

What percentage of the F2 generation plants are heterozygous?

• 75%

• 50%

• 25%

• 100%

What is the phenotype ratio in the F2 generation?

• 1:1:2

• 2:1:1

• 3:1

• 1:2:1

What percentage of the F2 generation plants are short?

• 50%

• 75%

• 25%

• 0%