The 8th graders used probability to obtain the gender of their offspring in a genetics task. The data is in the chart below. Remembering that the mother has XX and the father has XY as their genotypes, why is the total of all the data more reasonable to analyze than th- individual class data? Use reasoning from the chart to justify your explanation. Total Classes Boys Girls Offspring 4. 8-A 9. 44% 56% 4. 8-B 9. 56% 44% 6. 8-C 86% 14% 5. 7 8-D 29% 71% Total 17 15 32

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Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.