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Sergeu [11.5K]
2 years ago
7

What is a toxic chemical produced by our excretory system called.

Biology
1 answer:
slega [8]2 years ago
4 0

Answer: ammonia

Explanation: Nitrogenous wastes in the body tend to form toxic ammonia, which must be excreted. Mammals such as humans excrete urea, while birds, reptiles, and some terrestrial invertebrates produce uric acid as waste. Uricothelic organisms tend to excrete uric acid waste in the form of a white paste or powder

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3 years ago
Which adaptive management stage helps us understand what objectives are actually met?
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The answer for your question is Monitor
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You are interested in mapping the location of two loci in crested geckos that control different aspects of the crest phenotype.
weqwewe [10]

Answer:

a. Ed/eD

b. RF=0.12

Explanation:

The alleles for genes D/d and E/e are:

  • D_: only on neck spikes
  • dd: along back spikes
  • E_: long spikes
  • ee: short spikes

After testcrossing a double heterozygote (DdEe x ddee) there are 4 types of offspring, two of them much more abundant than the other two. The homozygous recessive parent can only produce <em>ed</em> gametes, so the phenotypes of the offspring depend on the gametes that the double heterozygous parent produced.

The offspring was:

  • Ed/ed 79
  • ed/ed 12
  • ED/ed 10
  • eD/ed 76

Total: 177

a) This result suggests that the genes are linked. Since recombination is a rare event, the most abundant phenotypes always come from the parental gametes, and the least abundant come from the recombinant gametes.

<u>Therefore, the genotype of the doube heterozygote parent was </u><u><em>Ed/eD</em></u><u>.</u>

b) Recombination frequency (RF) = Recombinants / Total

  RF = (12+10)/177

  <u>RF = 0.12</u>

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3 years ago
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What do you do if new observations DONT support your inference?
zubka84 [21]

Answer:

c

Explanation:

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Explain the differences between a point mutation and a frameshift mutation.
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a point mutation only mutates and changes that particular spot in the DNA strand while a frameshift changes the whole strand by moving the bases either one forward or backward

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