Genetics and Pedigree Concepts

The video tutorial covers the concepts of pedigrees and Punnett squares, explaining how pedigrees document genetic history and Punnett squares predict future genetic traits. It introduces key genetic vocabulary such as phenotype and genotype, and discusses dominant and recessive traits. The tutorial includes examples of pedigrees and Punnett squares, and concludes with an assignment for students to apply their learning.

What is the primary purpose of a pedigree?

• To show historical traits

• To identify genetic mutations

• To predict future generations

• To calculate genetic probabilities

How does a punnett square help in genetics?

• It maps out family trees

• It shows the history of traits

• It identifies genetic disorders

• It predicts potential offspring traits

What do dominant traits require to be expressed?

• Two dominant alleles

• No alleles

• One dominant allele

• Two recessive alleles

What is the term for the physical appearance of a trait?

• Genotype

• Phenotype

• Allele

• Chromosome

Which of the following represents a genotype?

• Blue eyes

• Bb

• Dimples

• Tall

In a pedigree, what does a filled-in shape typically represent?

• A carrier of a trait

• An unknown trait

• A dominant trait

• A recessive trait

What must be true for a recessive trait to be expressed?

• One recessive allele is present

• One dominant allele is present

• Two recessive alleles are present

• No alleles are present

What does a punnett square predict?

• The genetic disorders in a family

• The historical traits of ancestors

• The probability of offspring traits

• The exact traits of future generations

In a punnett square, what do the letters inside the boxes represent?

• Genotypes

• Phenotypes

• Chromosomes

• Mutations

What is the significance of capital letters in a punnett square?

• They represent non-genetic traits

• They represent recessive traits

• They represent dominant traits

• They represent unknown traits