Exploring Mendelian Genetics Concepts

Mr. Anderson discusses Gregor Mendel's foundational work in genetics, focusing on his experiments with pea plants and the development of key genetic concepts such as monohybrid and dihybrid crosses, independent assortment, and segregation. The video explains Mendel's laws and demonstrates how to use Punnett squares and probability to predict genetic outcomes. It also addresses common misconceptions and provides practice problems to reinforce understanding.

Who is credited with the foundational ideas behind genetics?

• James Watson

• Gregor Mendel

• Charles Darwin

• Francis Crick

What is a monohybrid cross?

• A cross involving one trait

• A cross involving four traits

• A cross involving three traits

• A cross involving two traits

What does independent assortment mean?

• Genes for different traits are inherited together

• Genes for different traits are inherited independently

• Genes for the same trait are inherited independently

• Genes for the same trait are inherited together

What is the phenotype ratio observed in Mendel's F2 generation?

• 4:1

• 3:1

• 2:1

• 1:1

What does the law of segregation state?

• Each organism has three genes for each trait

• Each organism has four genes for each trait

• Each organism has two genes for each trait

• Each organism has one gene for each trait

What is the dominant trait in Mendel's pea plant experiments?

• White flowers

• Wrinkled seeds

• Yellow pods

• Green pods

What is the purpose of a Punnett square?

• To calculate the age of an organism

• To measure the size of an organism

• To predict the genetic outcome of a cross

• To determine the physical appearance of an organism

What is the probability of getting heads in a coin flip?

• 1/4

• 1/3

• 1/2

• 1/1

What does homozygous mean?

• Having two different alleles for a trait

• Having two identical alleles for a trait

• Having three different alleles for a trait

• Having three identical alleles for a trait

What is the phenotype of a plant with the genotype big P little P?

• White flowers

• Purple flowers

• Green pods

• Yellow pods

Tags

NGSS.HS-LS3-1