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4 years ago

Griffith called the process he observed transformation because

Biology

1 answer:

Y_Kistochka [10]4 years ago

3 0

Answer:

c. The harmless bacteria had been transformed.

Explanation:

Fredrick Griffith carried out the first experiment that showed bacteria can get DNA by transformation in 1928.

He used two different strains of the bacteria Streptococcus pneumoniae a)type-III-S or smooth strain-Covered by a protective polysaccharide capsule hence lethal

b) type II-R or rough strain-Lacked the polysaccharide hence non-lethal

In his experiment he observed heat killed Type-III-S strain was not able to kill the mice. However, when its remains was added with rough strain then the blend was able to kill the mice.

When he collected blood from the dead mice it had live strains of both smooth and rough type.

He came to a conclusion that non-lethal type II-R strain was transformed into lethal type II-S strain by a "transforming principle" that was supposed to be the part of dead III-S strain bacteria.

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Which of the following undergoes change during a chemical reaction?

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It D hope that helps Have a good day

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3 years ago

In some breeds of mice, yellow coat color is

Elis [28]

In the exposed lethal genes cause the individual's death during embryionic development before being born. H0m0zyg0us dominant individuals do not get born. Yellow: 2/3. Grey: 1/3. Phenotypic ratio: 2:1

<h3>What is complete dominance?</h3>

When the dominant allele completely masks the expression recessive allele, we talk about complete dominance.

This is the case of individuals that are heter0zyg0us for a particular gene and express the dominant trait.

The dominant allele is hiding the expression of the recessive allele.

<h3>What are the lethal genes?</h3>

Refer to genes that impede the normal development of the individual.

They can cause death during embryo development before the individual gets born,

They can cause the individual's death after being born and before reaching sèxual maturity.

Let us assume that mice color is coded by a single diallelic gene that expresses complete dominance.

Available data:

Yellow color is dominant over grey color.

Yellow is coded by the dominant allele Y
Grey is coded by the recessive allele y

Genotype YY → Yellow and lethal

Genotype Yy → Yellow

Genotype yy → Grey

The cross would be as follows,

Cross: Yy x Yy

Gametes) Y y Y y

Punnett square) Y y

Y YY Yy

y Yy yy

F1) Considering ONLY the successfully born individuals

Genotype

2/3 = 50% of the progeny is expected to be heter0zyg0us, Yy.

1/3 = 25% of the progeny is expected to be h0m0zyg0us recessive, yy.

Phenotype

2/3 = 50% of the progeny is expected to be yellow, Yy.

1/3 = 25% of the progeny is expected to be grey, yy.

The phenotypic ratio is 2:1

You will learn more about lethal genes at

brainly.com/question/13654244

brainly.com/question/14932405

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2 years ago

What is the difference between inductive and deductive reasoning?

murzikaleks [220]

The main difference between inductive and deductive reasoning is that when we're doing inductive reasoning we're trying to create formal rules or formal inferences from a limited set of information, while during deductive reasoning, we're trying to deduce what would happen in a certain case based on general information available.

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3 years ago

Which of the following identifies three problems facing cloning?

Reil [10]

Answer:

A: low survival rates, abnormal development,and susceptibility to disease.

Explanation:

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3 years ago

Rapid digestion of a cell by its own lysosomes is called

Xelga [282]

When the lysosomes of a cell rapidly digest the cell itself, this process is known as autolysis. This self digestion process helps in the decomposition of the dead cells. The cell is dismantled by its own lysosomes, which digests the remains of the dead cell. It is an essential process in the life cycle of a cell. This self digestion of the cells is extremely important for the new cells to grow.

Hence, the correct answer is 'autolysis'.

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3 years ago