Mendelian Genetics Learning Goal: How are traits passed down from parents to offspring? Concept 1: Analyzing the effects of classic Mendelian genetic crosses such as monohybrid, dihybrid, testcross, and applying to pedigree diagrams. PART 1

Try This! True or False. 1) Chromosomes with a single unreplicated chromatid are found in haploid cells; replicated chromosomes with two chromatids are found in diploid cells 2) Chromosomes consisting of two chromatids are formed when a maternal chromatid and a paternal chromatid come together during fertilization and join at the centromere. 3) Genes often have more than two alleles.

Try This! True or False. False False TRUE! 1) Chromosomes with a single unreplicated chromatid are found in haploid cells; replicated chromosomes with two chromatids are found in diploid cells 2) Chromosomes consisting of two chromatids are formed when a maternal chromatid and a paternal chromatid come together during fertilization and join at the centromere. 3) Genes often have more than two alleles. False False TRUE!

Mendel!! Gregor Johann Mendel July 20, 1822 – Jan 6, 1884 Austrian Empire (present day Czech) Between 1856 and 1863 Mendel cultivated and tested some 29,000 pea plants! At first Mendel's work was rejected, and it was not widely accepted until after he died. It was not until the early 20th century that the importance of his ideas was realized.

What does this mean?

Test Cross!

Now… Read pg 262-271 in Campbell Do Questions #1-3 p. 269 and #1-3 p. 271 Make sure you’ve finished the gametes handout