In rats, the following genotypes of two independently assorting autosomal genes determine coat color as follows: A-B- (gray), A-bb (yellow), aaB- (black), aabb (cream). A third gene pair on a separate autosome determines whether or not any color will be produced. DD and Dd genotypes allow color according to the expression of the A and B alleles. However, the dd genotype results in albino rats regardless of alleles of the A and B alleles present. Determine the phenotypic ratios of the offspring from the following crosses:

AaBbDd x AaBbDd

19/36 Gray, 9/36=1/4 albino, 5/36 yellow and 3/36-1/12 Black offspring.

Explanation:

To produce a gray- A-B-

To produce yellow - A-bb

To produce black - aaB-

To produce cream - aabb

To produce any colour among the above - D-

To produce an albino - dd

A cross between two grays will give rise to  

                      AaBbDd   x     AaBbDd

 19/36 Gray, 9/36=1/4 albino, 5/36 yellow and 3/36-1/12 Black offspring

lysosomes contain a variety of enzymes, enabling the cell to break down various biomolecules it engulfs, including peptides, nucleic acids, carbohydrates, and lipids (lysosomal lipase). the enzymes responsible for this hydrolysis require an acidic environment for optimal activity. hope i !

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