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zavuch27 [327]
3 years ago
7

When restraining a rat, you should never A. grasp the end of the tail. B. grasp the base of the tail. C. hold the rat so that br

eathing is unimpeded. D. grasp the neck by placing thumb and forefinger around the lower jaw.
Biology
2 answers:
skelet666 [1.2K]3 years ago
8 0
You should never grab the end of the tail
lara [203]3 years ago
8 0
B. Grasp the base of the tail. If you do that then you could possibly rip its tail off.
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The West Bank, Gaza Strip, Sinal Peninsula, and Golan Heights were conquered by Israel during the
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D, The Sixth Day War

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Fill in the blanks below to complete the hypothesis for this lab. It should answer the lab question, "What is the effect of mole
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They can pass through the semi permeable membrane

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4. A population of water snakes is found on an island in Lake Erie. Some of the snakes are banded and some are unbanded; the ban
Colt1911 [192]

Answer:

233 snakes are heterozygous for the banding allele

Explanation:

According to Hardy-Weinberg, the allelic frequencies in a locus are represented as p and q, referring to the alleles. The genotypic frequencies after one generation are p² (Homozygous for allele p), 2pq (Heterozygous), q² (Homozygous for the allele q). Populations in H-W equilibrium will get the same allelic frequencies generation after generation. The sum of these allelic frequencies equals 1, this is p + q = 1.

In the exposed example,

  • The banding phenotype is autosomal recessive, bb
  • The frequency of banded snakes on the island is 0.4
  • There are 500 total snakes on the island

How many snakes are heterozygous for the banding allele?

The frequency of banded snakes refers to the genotypic frequency for the trait, which is bb= q2= 0.4.

If q2= 0.4, then q = √0.4 = 0.63

The allelic frequency for b is 0.63.  

This means that the allelic frequency for B or p is 0.37, which we deduce by clearing the equation p + q = 1

                          p + 0.63 = 1

                          p = 1 - 0.63

                          p = 0.37

The allelic frequency of B is 0,37, and the allelic frequency for b is 0,63. The population heterozygote frequency for this allele is 2 x p x q = 2 x 0,37 x 0,63 = 0.466. The percentage of the population that is heterozygous for this allele is 46%.

As the population size is 500 individuals, then we can calculate how many of these snakes are heterozygous. This is: 0.466 x 500 = 233

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