Predicting Traits with Punnett Squares
Learning Objective
I can use a Punnett square to predict the probability of traits in offspring.
Key Concepts
Gregor Mendel studied heredity using pea plants and determined that traits are passed on through discrete units called genes.
The F1 generation is the first filial generation, and the F2 generation is the second filial generation; Mendel observed trait expression, or phenotypes, up to the F2 generation.
A Punnett square uses a grid to show all possible combinations of alleles from two parents; homozygous organisms have identical alleles, while heterozygous organisms have one of each allele.
Practice Questions
This lesson includes 12 practice questions to reinforce learning.
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1. What is the purpose of a Punnett square?
2. In genetics, what does the term 'allele' refer to?
3. Explain the difference between homozygous and heterozygous genotypes.
...and 9 more questions
Educational Video
Mendelian Genetics and Punnett Squares
Professor Dave Explains