Introduction to Punnett Squares and Genetic Inheritance Analysis

The video tutorial explains genetic inheritance using Punnett squares. It defines key terms like genotype and phenotype, and illustrates genetic variation with an example of kittens. The tutorial focuses on monohybrid inheritance, using mice to demonstrate how a single gene affects fur color. It explains how to use a Punnett square to predict genetic outcomes, showing the possible genotypes and phenotypes of offspring. The video concludes with calculating phenotypic ratios and probabilities, emphasizing the likelihood of certain traits appearing in offspring.

What is the term used to describe the physical traits produced by a set of alleles?

• Chromosome

• Allele

• Phenotype

• Genotype

In a monohybrid cross, how is the dominant allele typically represented?

• With a capital letter

• With a symbol

• With a number

• With a lowercase letter

What is the probability of an offspring having black fur when two heterozygous black mice breed?

• 1.00

• 0.75

• 0.50

• 0.25

What is the ratio of homozygous dominant to heterozygous to homozygous recessive genotypes in the offspring?

• 2:1:2

• 1:2:1

• 1:1:1

• 3:1:0

How many of the four possible genotypes result in a mouse with black fur?

• Two

• One

• Four

• Three