<span>Very very unlikely.
Since the recessive allele is on the X chromosome, in order for a woman to have this condition, both copies of her X chromosome has to have the recessive allele. One copy of the allele would have to come from her mother, and the second copy from her father. The copy from her mother is a 50/50 chance if her mother was heterozygous with one copy of the recessive allele and one copy of a normal allele and therefore didn't exhibit the dystrophy and therefore didn't know she was a carrier. But the father only has 1 copy of the allele and therefore would exhibit the dystrophy and as such would be unlikely to have engaged in procreative sex that would pass on the defective allele to his offspring. This is especially true since duchenne muscular dystrophy will typically start to manifest itself in male children around starting around age 4.</span>
Enzymes <u>speed</u><u> </u><u>up</u><u> </u>chemical reactions.
Answer:
b. Two oppositely-charged ions
Explanation:
opposites attract when talking about ions
The cell has several structures and organelles that help it perform its role in an organism.
1. Plasma membrane. This mediates cell to cell interactions and adhesion to surfaces.
2. Cytoplasmic matrix. This forms an environment for other organelles and is the location of many metabolic processes.
3. Nucleus. This is the repository for genetic information and is also the control center of the cell.
4. Mitochondria. This are used for energy production.
5. Golgi apparatus. These are used for packaging and secretion of materials for various purposes and for lysosome production.
6.Cell wall and Pellicle. Strengthen and give shape to the cell.
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