Genetics and Inheritance Concepts

The video tutorial covers Mendelian inheritance using pea plant traits, explaining dominant and recessive alleles. It provides examples of phenotype and genotype relationships, and guides through practice problems involving trait crosses. The tutorial concludes with a preview of future topics, including traits on the X chromosome.

What is the primary focus of Mendelian inheritance?

• Traits that are either completely dominant or recessive

• Traits that change over time

• Traits that are only found in animals

• Traits that are influenced by the environment

If a pea plant has a genotype of 'Big T Little t', what is its phenotype?

• Round

• Short

• Medium

• Tall

What does homozygous mean in genetic terms?

• Having two identical alleles for a trait

• Having two different alleles for a trait

• Having no alleles for a trait

• Having three alleles for a trait

In a cross between a pure breeding tall plant and a short plant, what is the expected phenotype of the offspring?

• All short

• Half tall, half short

• All tall

• Three-quarters tall, one-quarter short

What is the genotype of a heterozygous round seed shape?

• Big R Big A

• Big R Little r

• Little r Little r

• Big R Big R

In a cross between two heterozygous yellow seed plants, what is the probability of getting a green seed plant?

• 25%

• 0%

• 50%

• 75%

What is the expected genotype ratio in a cross between two heterozygous plants?

• 2:2

• 1:1

• 3:1

• 1:2:1

If two tall pea plants produce some short offspring, what can be inferred about the parents' genotypes?

• Both are homozygous tall

• One is homozygous tall, the other is short

• Both are short

• Both are heterozygous

What percentage of offspring are expected to be tall when two heterozygous tall plants are crossed?

• 75%

• 50%

• 25%

• 100%

What future topic will be covered that involves traits on the X chromosome?

• Mendelian inheritance

• Environmental traits

• X-linked traits like color blindness

• Dominant and recessive traits