Tortoise shell cats, like the one shown above, are always female. what scientific phenomenon explains the color pattern of this cat? a) random x inactivation b) acetylation of the sry gene c) alternate splicing of exons d) chromosomal deletion of regions of the x chromosome

Random X inactivation The random coloration pattern arises from the fact that female mammals have two X chromosomes and the orange and black colors are located on the X chromosome. In female mammals, one X chromosome is inactivated in each somatic cell, but the pattern is random. This means that the color pattern during embryonic development will be a mixture of orange and black. (USATESTPREP answer and explanation)

ysosomes are membrane-bound vesicles that contain digestive enzymes, such as glycosidases, proteases and sulfatases. lysosomal enzymes are synthesized in the endoplasmic reticulum (er), are transported to the golgi apparatus, and are tagged for lysosomes by the addition of mannose-6-phosphate label.

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