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masya89 [10]
3 years ago
15

Imagine that the islands of the Lesser Antilles in the Caribbean Sea are getting progressively smaller and farther apart as wate

r engulfs more of the islands each year. What is most likely to happen to the toad population in the area?
Biology
2 answers:
Ugo [173]3 years ago
6 0

Answer:

) Two or more populations of toads will form that are genetically distinct from each other because the toads will eventually become isolated on each island.

Explanation:

When the same  species of organism are separated by geographical or physical  barriers so that the  environmental pressure of the two new population created by the physical barrier  leads to changes in the morphological features  so that   two new isolated  populations  of organisms of different species evolved the type of speciation is called allopatric speciation.

If the two new population  are made to mate together, this will not be possible because two different species are formed.

Therefore the toad population will lead to formation  of  two new species which are <u>genetically distinct from each other because the toads will eventually become isolated on each island. </u>

mezya [45]3 years ago
3 0

Answer:

a)

Explanation:

Based on the scenario being described within the question it can be said that two or more populations of toads will form that are genetically distinct from each other because the toads will eventually become isolated on each island. This is mainly due to one population beating out the other in each island and/or adapting the the unique features of the island.

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6 0
2 years ago
Each of the four pedigrees that follow represents a human family within which a genetic disease is segregating. Affected individ
Ne4ueva [31]

 Answer:

<u> The following four traits are -: </u>

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  • <u>Pedigree 2- Recessive inheritance is defined by Pedigree 2. </u>
  • <u>Pedigree 3</u> - The inheritance of the dominant trait (autosomal dominant) is illustrated by Pedigree 3.
  • <u>Pedigree 4-</u> An X-like dominant trait is expressed by Pedigree 4.    

Explanation:

<u>Explaination of each pedigree chart</u>-

  • Pedigree 1 demonstrates the <u>recessive trait </u>since their children have been affected by two unaffected individuals. If the characteristics were X-linked, in order to have an affected daughter, I-1 would have to be affected. X^A In this, both parents are autosomal recessive trait carriers, so the child will be affected by a 1/4 (aa)
  • <u> Recessive inheritance</u> is defined by <u>Pedigree 2</u>. This is<u> X-related inheritance as autosomal recessive</u> inheritance has already been accounted for in part 1. This inference is confirmed by evidence showing that the father (I-1) is unaffected and that only the sons exhibit the characteristic in generation II, suggesting that the mother must be the carrier. The individual I-2 is a carrier for this X-linked trait. A typical  Xa chromosome is attached to the unaffected father (I-1), so the chance of carrier II-5 is 1/2. Probability of an affected son = 1/2 (probability II-5 is a carrier) x 1/2 (probability II -5 contributes (X^A) x 1/2 (probability of Y from father II-6) = 1/8. An affected daughter's likelihood is 0 because a typical X^A must be contributed by II-6.
  • The inheritance of the<u> dominant trait</u> is demonstrated by <u>Pedigree 3 </u>because affected children still have affected parents (remember that all four diseases are rare). The trait must be <u>autosomal dominant</u> because it is passed down to the son by the affected father. There is a 1/2 risk that the heterozygous mother (II-5) would pass on mutant alleles to a child of either sex for an autosomal dominant feature.
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In the question the pedigree chart was missing ,hence it is given below.

     

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