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Alinara [238K]
3 years ago
8

Some organisms that are alive today do not look exactly like organisms that lived in the past. However, if a comparison of DNA s

amples from two organisms that differ in appearance reveals that the organisms are nearly genetically identical, the samples may be used as evidence for
Biology
1 answer:
Andrei [34K]3 years ago
7 0

Answer:

If it is study island then it is B

Explanation:

B. the theory of evolution, or the theory that characteristics of populations can change over time.

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Suppose we were successful in identifying 12 mutants using a screen for identifying conditional mutants of S. cerevisiae in whic
Marina CMI [18]

Answer:

Each mutant would be mated to wild type and to every other mutant to create diploid strains. The diploids would be assayed for growth at permissive and restrictive temperature. Diploids formed by mating a mutant to a wild type that can grow at restrictive temperatures identify the mutation as recessive. Only recessive mutations can be studied using complementation analysis. Diploids formed by mating two recessive mutants identify mutations in the same gene if the diploid cannot grow at restrictive temperature (non-complementation), and they identify mutations in different genes if the diploids can grow at restrictive temperature (complementation).

Explanation:

Recessive mutations are those whose phenotypic effects are only visible in homo-zygous individuals. Moreover, a complementation test is a genetic technique used to determine if two different mutations associated with a phenotype colocalize in the same <em>locus</em> (i.e., they are alleles of the same gene) or affect two different <em>loci</em>.  In diploid (2n) organisms, this test is performed by crossing two homo-zygous recessive mutants and then observing whether offspring have the wild-type phenotype. When two different recessive mutations localize in different <em>loci</em>, they can be considered as 'complementary' since the heterozygote condition may rescue the function lost in homo-zygous recessive mutants. In consequence, when two recessive mutations are combined in the same genetic background (i.e., in the same individual) and they produce the same phenotype, it is possible to determine that both mutations are alleles of the same gene/<em>locus</em>.

5 0
3 years ago
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lord [1]
B is the right answer
5 0
4 years ago
Based upon the mechanics of mantle convection, which feature will most likely be formed at the blue arrow, and through which mec
Vilka [71]
The answer to the question is A
6 0
3 years ago
Read 2 more answers
What purpose does a female pine cone serve?
Neporo4naja [7]

The answer is A It protects the seed until it matures.

hope this helps

7 0
3 years ago
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Jimmy finds a hunk of something. It appears to be an element. It melts at 500*C and when it was run over by a train, it got crus
ss7ja [257]

Answer:

C. Metalloid

Explanation:

<h3>I believe that's the answer, correct me if I'm wrong. </h3>
3 0
3 years ago
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