1/23 Warm Up 1. In certain rats, black fur is dominant over white fur. If two rats, both heterozygous for fur color, are mated, their offspring would.

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1/23 Warm Up 1. In certain rats, black fur is dominant over white fur. If two rats, both heterozygous for fur color, are mated, their offspring would be expected to have: show the cross! ____genotypes and ____phenotypes 2. T or F: meiosis produces a greater amount of genetic material than mitosis. 3. How many pairs of chromosomes would an organism have in their somatic cells if it contained 28 total chromosomes? 4. From question 3, which is the haploid number and which is the diploid number?

1/24 Warm Up Draw the diagram to the left. The squares represent males and the circles are females. If an open square or circle represents a widows peak, what are the alleles of each individual? W = widows peak (V) w = straight hairline

1/25 or 1/26 Warm Up Which type of biomolecule is coiled into chromosomes? What is the monomer for question 1? Chromosomes 1-22 are called _________. What are the male chromosomes? What are the female chromosomes? List 3 disorders discussed in yesterday’s notes and describe their characteristics.

1/27 Warm Up Show the punnet square for a male, Greg, with color blindness and Alice, a female carrier. Draw a pedigree to represent question one if the couple has three children (2 boys and a girl). The daughter, Jane, is colorblind. Show the genotypes. Show the punnet square for a female with hemophilia and a normal male. What disorder is a result of trisomy 21? What disorder is a result of XXY?