Beth and joe meet in bio 1a lab at u. c.s. b. they begin to study together and ultimately decide to marry after graduation. upon meeting each other's family the night before the wedding ceremony, they discover that beth's sister has the same rare recessive disorder as joe's brother. when beth realizes this, she begins to have doubts about marrying joe. the family pedigrees are shown below:

the answer would be 2, if crossing over doesn’t occur 2 out of 4 of the daughter cells will have that allele.

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silty loam

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c. heat from the poles back down towards the equator.

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.