How can dominant-lethal alleles be passed down? (choose the best answer! ) a. they can’t, as they are lethal. b. they can be passed down if the individual with the lethal mutation lives to reproductive age and has a child. c. dominant-lethal alleles occur solely through spontaneous mutations, they are not passed down through generations. d. they can be passed down if the individual freezes their eggs or sperm to allow a child to be born with their genetics, even after they pass.

b

Explanation:

Dominant lethal alleles can be passed down if the individual can live to a reproductive age. The individual can then have children and can possibly pass down the lethal allele

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

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