You can get 1/4 tortoise female; 1/4 black female; 1/4 yellow male; 1/4 black male.
IT IS NOT possible to obtain a tortoise-shell male primarily because to have tortoise shell one has to be heterozygous. In case of males, they are hemizyogous so they only get one chromosome with the gene because they have XY and we know this disease is linked on X chromosome because different combinations give us different colors.
I say they are hemizygous because For example, most of the genes of the X chromosome and Y chromosome in human males are hemizygous since males have only one X chromosome (and one Y chromosome) (unlike females that has two X chromosomes).
Enzymes are a type of protein, which speed up the rate of a reaction but are not used up or changed during the reaction. The enzyme lactase will speed up the <span> reaction of breaking down lactose. </span>
