What does a Punnett square tell you?   a.The inheritance pattern for a pair of alleles   b.The phenotype probabilities of offspring for a given cross   c.The number of offspring who will have a particular genotype for a given cross   d.The genotype probabilities of offspring for a given cross 2.What would be the most likely karyotype for somebody described as “hemizygous positive for a Y-linked trait”?   a.Y+ Y+   b.X Y+   c.X+ Y+   d.X+ Y- 3.X-linked ichthyosis is an X-linked recessive trait that manifests in part as dry, scaly skin (“ichthy-” = fish or fish like). Suppose a couple are considering having a child together. Parent A is heterozygous for the ichthyosis allele while Parent B is hemizygous negative for the ichthyosis allele. What is the probability their child would be unafflicted with ichthyosis but be a carrier of the ichthyosis-causing allele?   a.0%   b.25%   c.50%   d.75%   e.100% 4.If somebody has the phenotype of Type B blood, what possible genotypes could they have? (select all that apply)   a.IA IA   b.IA i   c.IB IB   d.IB i   e.IA IB   f.i i

a.IA IA

b.IA i

c.IB IB

d.IB i

e.IA IB

f.i i

5.Get your Punnett square ready!

Two people decide to start a relationship and begin considering having a child together. One parent is heterozygous for red-green color blindness while the other parent is hemizygous for regular color vision.

What is the probability that their kid will not have red-green colorblindness but will be a carrier for the red-green color blindness trait?

Note: Red-green color blindness is an X-linked recessive trait. For this example, you may assume there are just the two alleles:

   XC- = red-green color blindness:

   XC+ = regular color vision

   Y = lacks that gene

You do not have to account for anything like aneuploidies, crossing over, or etc.

1. 0%
2. 25%
3. 50%
4. 75%
5. 100%

6.X-linked hypophosphatemia (XLH) is an X-linked dominant trait that causes various skeletal deformities and disorders. Suppose a person who was homozygous negative for XLH was considering having a child with someone who was hemizygous positive for XLH. What is the probability that their child would develop XLH?

1. 0%
2. 25%
3. 50%
4. 75%
5. 100%

7. X-linked hypophosphatemia (XLH) is an X-linked dominant trait that causes various skeletal deformities and disorders. Suppose a person who was homozygous negative for XLH was considering having a child with someone who was hemizygous positive for XLH. What is the probability that their child would not develop XLH but be considered a carrier of the XLH-causing allele? (Hint: think carefully about the question and what it means to be a “carrier”)

1. 0%
2. 25%
3. 50%
4. 75%
5. 100%

8.Get your Punnett square ready!

Two people decide to start a relationship and begin considering having a child together. One parent is homozygous for regular color vision while the other parent is hemizygous for red-green color blindness .

What is the probability that their kid will have red-green colorblindness?

Note: Red-green color blindness is an X-linked recessive trait. For this example, you may assume there are just the two alleles:

   XC- = red-green color blindness:

   XC+ = regular color vision

   Y = lacks that gene

You do not have to account for anything like aneuploidies, crossing over, or etc.

1. 0%
2. 25%
3. 50%
4. 75%
5. 100%

9.Consult the given pedigree. What genotype does person "A" have?

a.Can't tell/not enough information

b.Heterozygous IA i

c. Homozygous IA IA

d.Heterozygous IA IB