Pedigrees
Pedigrees
Pedigree analysis can be used to track traits within families and to predict the probability that offspring will have specific genotypes and phenotypes.
Learning Objective: Diagram the pedigrees for various animal crosses, including genotypes and phenotypes of parents and offspring.
Horses are odd-toed ungulate mammals classified in Family Equidae.
Horse ancestors were small and multi-toed. Over approximately 45 million years, the horse ancestors got larger and eventually developed a single toe per foot.
Humans started domesticating horses approximately 6,000 years ago. Some of the horse breeds, like the Arabian horses, are carefully selected and bred to maintain specific characteristics. These characteristics can be tracked with a pedigree analysis.
A pedigree visually represents individual organisms in a family. Pedigrees are used to study traits in horses, dogs, rats, and even humans.
Mark demonstrates the power of pedigree analysis in understanding inheritance within a family.
Watch this video; you can select the closed captioning “cc” option if you would like to see the text.
Now, the pedigrees chart is linked back to a different visualization: the Punnett Squares introduced in a previous guide.
Pedigrees and Punnett squares are visualization tools that enable us to keep track of genotypes and phenotypes from one generation to the next.
Check your knowledge – Pedigrees
Review your notes. Can you read a pedigree and predict genotypes and phenotypes? If so, move forward to the next page.
Learning Objective:
Diagram the pedigrees for various animal crosses, including genotypes and phenotypes of parents and offspring.
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