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Introduction to Mendelian Genetics

Author(s): Lisa M. Meffert, PhD

Crossing the Parental Lines: Male Contribution

Each offspring will receive one allele for plant height from each parent (and thus will end up with two alleles for this characteristic). Write each type of allele that the male can contribute in each box, going down. In this case, the male parent only can contribute a "T" to the gametes that will go to each of the offspring.

Since one "T" ends up in each male gamete, the alleles are following Mendel's first law of inheritance: The Law of Segregation. The two alleles that made the male tall are now segregating to produce the next generation.