SCI 1015 JWU Wk 14 Autosomal Dominant and Recessive Traits Questions

1. Using the Punnett Square below, please show a cross between two carriers of Tay-Sach’s disease.

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Most genes are carried on the 22 chromosomes that are not the sex chromosomes X and Y. These are called autosomes, and traits with genes found on these chromosomes are called autosomal traits.

Autosomal Dominance – Achondroplasia

12. First, determine the possible genotypes of each of the following:

Phenotype (Disorder Status) Genotype

Person with Achondroplasia

Person without Achondroplasia

1.Using a Punnett Square please show how
it is possible for two people who have achondroplasia to have a child that is
“normal”

What are the chances of a couple who both have
achondroplasia to have a “normal” child? To have a child with achondroplasia?

1. First, determine the possible genotypes of each of the following:

2. Phenotype (Disorder Status)
   Person with Tay-Sach’s
   Person without Tay-Sach’s
   Carrier of Tay-Sach’s

   1.
   Using a Punnett Square , please show a
   cross between two carriers of Tay-Sach’s disease

3. What
   are the chances of a couple who are both carriers to have a normal child? To
   have a carrier? To have a child with Tay-Sach’s?