Answer:
the genotype of the bacteria in this E.coli colony is arg^+leu^-met^+
Explanation:
The organism which, due to the lack of particular genes, can not synthesize a particular metabolite or nutrient by itself and needs the nutrient to the growing supplement is called auxotroph. The colony E.coli began to grow on a limited medium with arginine and leucine, and not with arginine and methionine in the above mentioned case. Leucine is therefore a vital metabolite required to grow bacteria and bacteria that do not contain the leu gene.
Therefore. the genotype of the bacteria in this E.coli colony is arg^+leu^-met^+
Mutations are positive occasionally, beneficial occasionally and omission of information.
Answer: Options 1, 3 and 4.
<u>Explanation:</u>
Mutations are more or less permanent changes. These changes are heritable in the phenotype of an individual. These changes occur because of the alteration in the number, kind or the sequence of nucleotide of the genetic material which is DNA in most of the cases.
Mutations occur at some times in the life of people and they are present in only some cells of the human body. They are not present in all the cells of the human body. These changes can also occur because of environmental factors like ultraviolet radiation from the sun.
The correct answer here will be, <u><em>A).</em></u>
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Cell so to tissue as tissue so to organ as organ is to organ system. Hope this helps helps!
Answer:
both A and C
Explanation:
To know whats happens with all the offspring and the probabilities you need to draw Punnett squares.
We will call T the dominant trait and t the recessive.
TT x tt = Tt Tt Tt Tt = 100% Tt
100% of the offspring will show the dominant allele.
Tt x Tt = TT Tt tT tt =25% TT 50% Tt 25% tt
Here, you have 25% chances that the offspring shows the recessive allele.
TT x TT = TT TT TT TT= 100% TT
100% of the offspring will show the dominant allele.
Tt x tt = Tt tt tt tt = 25% Tt 75% tt
Here, you have 75% chances that the offspring shows the recessive allele.
