describe how carbon dioxide is produced by respiring muscle cells reaches the alveolar cavitiesin mammalian lungs​

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The carbon (iv) oxide which has been produced by the respiring muscle tissue is diffused into the bloodstream in the form of bicarbonates, a process facilitated by an enzyme called carbonic anhydrase. The carbon (iv) oxide is then carried to the lungs.

Explanation:

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.