20 POINTS 20 POINTS The following chart shows the average life expectancy for citizens of the United States. Life expectancy for
each year is the life span a person could expect if the death rate stayed forever at the value it had during that year.
What can be known or predicted from this chart?
A.
the actual average lifespan of people born in 1980
B.
the age at which a particular person will die
C.
the probable life expectancy in the US in 2007
D.
the probable population of the US in 2007
What can be known or predicted from this chart?
A.
the actual average lifespan of people born in 1980
B.
the age at which a particular person will die
C.
the probable life expectancy in the US in 2007
D.
the probable population of the US in 2007
2 answers:
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Answer:
Explanation:
Given:
Traits
T (tall, dominant) and t (short)
R (round, dominant) and r (wrinkle)
Crossing parents
<u>hetero-zygous. tall wrinkled (</u><u>Ttrr</u><u>)</u>
phenotype tall is given hetero-zygous., so Tt
phenotype wrinkled is recessive, so must be homo-zygous rr
<u>Foiled genotypes</u> (Tr, tr, each with 50%)
<u>short hetero-zygous. round (</u><u>ttRr</u><u>)</u>
phenotype short is recessive, so homo-zygous rr
phenotype round is given heteroz. so Rr
<u>Foiled genotypes</u> (tR, tr, each with 50%)
Offsprings on a 4x4 punnett square
See diagram
