D. is the answer.
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The answer is B) roan x roan.
Let's summarize:
R - dominant allele,
r - recessive allele,
<u>RR </u>- dominant homozygous with <u>red color</u>,
<u>rr </u>- recessive homozygous with <u>white color</u>,
<u>Rr </u>- heterozygous with <u>roan color</u>.
If we cross two heterozygous (Rr):
Parents: Rr x Rr
Offspring: RR Rr Rr rr
then, the offspring will be: <u>1 red</u> (RR) : <u>2 roan</u> (Rr, Rr ) : <u>1 white</u> (rr).
Since the earth is rotating while this is happening, two tides occur<span> each day. When the sun and moon are aligned, there are exceptionally strong gravitational forces, causing very </span>high and very low tides which are called spring tides, though they have nothing to do<span> with the season.
</span><span>As the earth rotates on its axis once every 24 hours, if the moon stood still then the moon will be overhead and 'underfoot' once in every 24 hours giving (in most places) 2 </span>high<span> and 2 low </span>tides<span> a day, but as the moon is also orbiting in the same direction as the earth revolves it actually takes about 24 hours and 50 ...</span>
Answer:
A is the correct answer............