Biology Forums - Study Force

22. two different genes control the expression of coat color in an organism. the allele B produces a black coat color and the allele G produces a gray stripped coat. the gene B influences the expression of gene G. the gray stripped coat pattern appears only when gene B is homozygous recessive. an albino (coat color lacking) occurs when both genes are homozygous.

a pure breeding black coated organism was mated with an albino organism; all offspring had black coats. organisms of the F1 genneration are suspected of being hertozygous for both genes. a test cross of albino organisms with the heterozygous organisms should produce a phenotypic ratio in the offspring of
a)1:0
b)3;1
c)2:1:1
d)1:1:1:1

23. what is the probability of albino offspring being produced from the test cross described above?

24. if the total offspring produced in the test corss were 1236 organisms, how many organisms would you expect to be black coated?use the information from questions 22 and 23.

Do you know how to use the hardy-Weinberg equation?

Advances in biotechnology have led to many important advances in our understanding of many human genetic disorders. As with the Human Genome Project, these advances have involved many research teams working together, either directly or by publishing their work in peer-reviewed articles.