Mastering Monohybrid Punnett Squares in Genetics

The video tutorial explains how to perform monohybrid punnett squares, focusing on one trait at a time. It covers several examples, including flower color, finger length, stem length, thumb type, hair type, and flower color again, to illustrate how dominant and recessive traits are inherited. The tutorial emphasizes the importance of understanding homozygous and heterozygous pairings and how they affect the probability of certain traits appearing in offspring.

What does 'monohybrid' refer to in genetics?

• A cross involving two traits

• A cross involving no traits

• A cross involving one trait

• A cross involving three traits

In a cross between a pink flower (PP) and a white flower (pp), what is the expected phenotype of the offspring?

• 75% pink, 25% white

• 100% pink

• 50% pink, 50% white

• 100% white

If a homozygous recessive mother (ff) and a heterozygous father (Ff) have children, what percentage will have long fingers?

• 25%

• 50%

• 100%

• 75%

What is the expected outcome when crossing a homozygous dominant plant with a homozygous recessive plant?

• 50% dominant, 50% recessive

• 100% recessive

• 100% dominant

• 75% dominant, 25% recessive

What is the probability of a child having a hitchhiker's thumb if one parent is heterozygous and the other is homozygous recessive?

• 50%

• 25%

• 0%

• 100%

What is the dominant trait in the example of hitchhiker's thumb?

• No thumb

• Hitchhiker's thumb

• Curly thumb

• Straight thumb

Which letter is used to represent the hitchhiker's thumb trait in the example?

• D

• A

• C

• B

If both parents are heterozygous for hair type, what is the probability of their child having curly hair?

• 75%

• 0%

• 25%

• 50%

In a cross between a homozygous dominant flower and a heterozygous flower, what is the chance of having green offspring?

• 75%

• 0%

• 25%

• 50%

In the example of flower color, which color is dominant?

• Purple

• White

• Pink

• Green