Meiosis<span> is the form of </span>cell<span> division by which unique </span>sex cells, or gametes, areproduced<span>. These </span>sex cells<span> only contain a half set of genetic information, During fertilization, two </span>sex cells<span> (a sperm </span>cell<span> and an egg </span>cell<span>) combine to produce a unique offspring </span>through sexual<span> reproduction.</span>
TT= Homozygous dominant (there is nothing recessive about TT)
Tt= heterozygous (contains a recessive trait (t))
tt= homozygous recessive
Hopefully this helped and good luck
Answer: 2. Adaptations
Reason: "adaptation = a change in structure, function, or behavior by which a species or individual improves its chance of survival in a specific environment"
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<u>cardic muscles:</u> are present only in the heart .single cell is not very strong by itself, millions of cardiac muscle cells working together are easily able to pump all of the blood in the body through the heart in less than a minute. Cardiac muscle cells have a branched shape so that each cell is in contact with three of four other cardiac muscle cells.
<u>characteristics of cardic muscles: </u> one nucleus ,striated, involuntary, branched and joined to one another by intercalated discs that contain gap junctions for depolarization between cells and hold the fibers together when the heart contracts.
