Ladybug Genetics and Phenotypes

The video tutorial introduces Mendel's First Law using ladybugs to explain genetic variations. It covers dominant and recessive genes, and demonstrates genetic crosses between parental and F1 generations, leading to F2 generation analysis. The tutorial also explains how to calculate probabilities of genetic outcomes, emphasizing the importance of understanding Mendel's principles in genetics.

What is the term used to describe the visual expression of a trait?

• Genotype

• Allele

• Gene

• Phenotype

In the example given, what color is the dominant trait for the ladybugs?

• Green

• Red

• Blue

• Yellow

What is the genotype of a homozygous dominant red ladybug?

• Aa

• aA

• aa

• AA

If a homozygous dominant red ladybug is crossed with a homozygous recessive blue ladybug, what will be the genotype of the F1 generation?

• Aa

• aa

• AA

• aA

What percentage of the F1 generation will display the red phenotype?

• 0%

• 50%

• 100%

• 25%

When two heterozygous F1 ladybugs are crossed, what is the expected phenotypic ratio in the F2 generation?

• 1:2:1

• 3:1

• 1:1

• 2:2

What is the genotype of a blue ladybug in the F2 generation?

• aa

• Aa

• aA

• AA

What is the probability of obtaining a blue ladybug when crossing a blue ladybug with a heterozygous red ladybug?

• 50%

• 25%

• 100%

• 75%

How many events are possible in the cross between a blue ladybug and a heterozygous red ladybug?

• 3

• 2

• 5

• 4

What is the simplified probability of obtaining a blue ladybug from the cross mentioned in the video?

• 1/1

• 1/4

• 1/2

• 3/4