Use the following information to answer the next question Giraffes and other hoofed animals, including impalas, steenboks, and kudus, feed on acacia trees on the African savannah. Giraffes feed on leaves at the top of the tree, whereas the other hoofed animals, which are smaller than giraffes, feed on the lower leaves. A controlled study showed that when smaller hoofed animals are prevented from feeding on a tree, giraffes feed on the lower leaves. 5. The giraffe's preference for feeding on leaves at the top of a tree is likely a result of intraspecific competition interspecific competition environmental resistance predator-prey interactions Cystic fibrosis (CF) is one of the most common autosomal recessive disorders. 1 in 2,500 Caucasian newborns have CF.

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Chapter18: Like Cats And Dogs
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Use the following information to answer the next question
Giraffes and other hoofed animals, including impalas, steenboks, and kudus, feed on
acacia trees on the African savannah.
Giraffes feed on leaves at the top of the tree, whereas the other hoofed animals,
which are smaller than giraffes, feed on the lower leaves. A controlled study showed
that when smaller hoofed animals are prevented from feeding on a tree, giraffes feed
on the lower leaves.
5.
The giraffe's preference for feeding on leaves at the top of a tree is likely a result
of
intraspecific competition
interspecific competition
environmental resistance
predator-prey interactions
Cystic fibrosis (CF) is one of the most common autosomal recessive disorders. 1 in
2,500 Caucasian newborns have CF.
12. The calculation that best represents the proportion of people who do not carry
any alleles for CF in the Caucasian population is
1/2500
n
n
1.
1/2500
1/2500
1
(1/2500)²
The ability to taste the chemical phenylthiocarbamide (PTC) is controlled by the
dominant allele T. Individuals who have the allele T find that PTC tastes bitter.
Homozygous recessive individuals find that PTC has no taste. In a sample of 320
people, 218 could taste PTC and 102 could not taste PTC.
15. Which of the following rows provides the probable percentage of this population
with each genotype indicated?
Row
0
Genotype TT
23%
19%
44%
15%
Genotype Tt
45%
49%
37%
29%
Genotype tt
32%
32%
19%
56%
Transcribed Image Text:Use the following information to answer the next question Giraffes and other hoofed animals, including impalas, steenboks, and kudus, feed on acacia trees on the African savannah. Giraffes feed on leaves at the top of the tree, whereas the other hoofed animals, which are smaller than giraffes, feed on the lower leaves. A controlled study showed that when smaller hoofed animals are prevented from feeding on a tree, giraffes feed on the lower leaves. 5. The giraffe's preference for feeding on leaves at the top of a tree is likely a result of intraspecific competition interspecific competition environmental resistance predator-prey interactions Cystic fibrosis (CF) is one of the most common autosomal recessive disorders. 1 in 2,500 Caucasian newborns have CF. 12. The calculation that best represents the proportion of people who do not carry any alleles for CF in the Caucasian population is 1/2500 n n 1. 1/2500 1/2500 1 (1/2500)² The ability to taste the chemical phenylthiocarbamide (PTC) is controlled by the dominant allele T. Individuals who have the allele T find that PTC tastes bitter. Homozygous recessive individuals find that PTC has no taste. In a sample of 320 people, 218 could taste PTC and 102 could not taste PTC. 15. Which of the following rows provides the probable percentage of this population with each genotype indicated? Row 0 Genotype TT 23% 19% 44% 15% Genotype Tt 45% 49% 37% 29% Genotype tt 32% 32% 19% 56%
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