Genetics Answers

1.    In humans, color blindness is a recessive, sex-linked trait. A colorblind father is married to a normal, carrier mother. Show the Punnett square solution below, and determine the possibility of obtaining the following offsprings: (only 1 Punnett square solution needed; 2 pts for the Punnett square solution)

Punette square:

a.    A female, colorblind offspring (1 pt)

b.    A male, normal offspring (1 pt)

c.     A male, colorblind offspring (1 pt)

1. Jin has blood type A. He marries Anna who has blood type B. They have four children, and all the blood types are represented in the children’s blood types (type A, B, AB, and O).

a.    What are the genotypes of Jin and Anna?

b.    Draw a Punnett square solution that shows how the genotypes of the children were made possible.

1.    In humans, Tay Sachs disease is a disorder is a recessive disease that causes an absence of enzymes needed to break down fatty substances. However, even if it is a recessive disorder, heterozygous individuals have a “partial manifestation” of Tay Sachs disease, where-in these individuals are able to produce half of the enzymes needed by the body, therefore making them normal individuals. Use the letter H to represent the traits.

a.    What type of inheritance is shown by Tay Sachs? Explain in not more than 5 sentences.

Discuss how the genetic code allows synthesis to take place with few errors (detail)

discuss how the genetic code allows synthesis to take place with few errors

Clearly where each stage of protein synthesis takes place preferably with 1 or 2 simple diagrams showing what happens

Discuss how the genetic code allows synthesis to take place with few errors.

In certain dog breeds, a wiry hair coat is dominant over a smooth coat. If a purebred wire-haired male dog is crossed with a heterozygous female, approximately how many of their 12 puppies should we expect to be wire-haired?

Explain the terms Chromosome, Chromatid, Gene, Allele.

(Use genetic notation (symbols for alleles) and annotated diagrams to illustrate your response.

Show links between the terms)

Can the benefits of genetic modification outweigh its risks? Why or why not? Provide at least two justifications to support your answer. 

Say clearly where each stage of protein synthesis takes place preferably with 1 or 2 simple diagrams showing what happens. Also discuss how the genetic code allows synthesis to take place with few errors