Which tenet of cell theory is described by the following paragraph about the historical observations of cells?

Biology

1 answer:

Molodets [167]2 years ago

6 0

Answer: The tenet of cell theory described by the following paragraph is

<em>The cell is the basic unit of the structure and organization in organisms.</em>

Explanation:

The three tenets to the cell theory are described as:

All living organisms are composed of one or more cells.
The cell is the basic unit of structure and organization in organisms.
Cells arise from pre-existing cells.

So the following paragraph describes tenet 2, which says that the cell is the basic unit of structure and organization in organisms.

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If alleles of two different genes assort independently during gamete formation then what should be the phenotypic ratio in the F

Pepsi [2]

Answer:

9:3:3:1

Explanation:

If alleles of two genes separate randomly during anaphase-I of meiosis, some new combinations of the alleles are formed in the gametes. A heterozygous genotype for two loci (let's support TtRr) produces a total of four types of gametes in 1:1:1:1 ratio (TR, Tr, tR, and tr). The random fusion of these gametes from two double heterozygous parents (TtRr x TtRr) gives a phenotype ratio of 9:3:3:1. Here, 9/16 F2 progeny exhibit dominant phenotype for both loci while 1/16 exhibits recessive phenotype for both the genes. Rest 3/16 and 3/16 F2 progeny express dominant trait for one gene and recessive for the other.

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2 years ago

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