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Fudgin [204]
4 years ago
7

Difinetion of a gene​

Biology
1 answer:
Anna71 [15]4 years ago
8 0

Answer:

structural and functional unit of heredity...

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In fruit flies, red eyes color (R) is dominated to brown (r), and normal spine (S) is dominated to spineless (s). Many flies are
frozen [14]

The percentage of progenies with red eyes and spine will be 56.25%.

<h3><u>Explanation:</u></h3>

This cross will be just similar to Mendel’s Dihybrid cross where he crossed the pea plants considering two characters at once.

Here two characters that are taken into account are eye colour and presence of spine. The eye colour has two traits - red and brown. Red colour is dominant. The presence of spine has also two possibilities - presence of spine or absence of spine.

The allele denoting red eye colour is R and allele denoting brown eye colour is r. Similarly, the allele denoting presence of spine is S and absence of spine is s.

Genotype of the heterozygous parents = RrSs.

Gametes produced by the parents= RS, Rs, rS and rs.

So crossing them, we get the phenotypic ratio of red eyed spined : red eyed spineless : brown eyed spined : brown eyed spineless = 9:3:3:1.

So, the percentage of red eyed spined = 56.25%.

5 0
3 years ago
Three main steps in the process of DNA replication. Name the enzymes that go with each step
Llana [10]

Answer:

The three mains in the process of DNA replication are 1 initiation 2 elongation 3 termination.

Explanation:

Enzymes those function during initiation

1 Helicase.

2 single strand binding protein.

3 Topoisomerase.

Enzymes those function during elongation

a DNA polymerase alpha

b  DNA polymerase delta

c  DNA polymerase epsilon

Enzymes those function during termination

1 Replication protein A

2 Replication factor C

6 0
3 years ago
List at least four beneficial activities of microorganisms
Ira Lisetskai [31]

Decomposition - decomposition is something we humans benefit a lot from in agriculture.

Immunity - reffering to the help that bacteria gives us in the immune syste.

Pollution control - reffering to the fact that some bacteria decompose man - made pollutants such as DDT, petroleum, etc.

Symbiosis - reffering to the help some symbiotic bacteria pose to humans by decomposing vitamins B and K.


Hope it helped,


BioTeacher101


4 0
3 years ago
In eukaryotes , DNA is found in the cytoplasm of the cell
Paladinen [302]
In eukariotes, cells that have a neculeus, the dna is found in the neculeus, not the cytoplasim so that is false... I dunno if that is what u were asking...
5 0
3 years ago
Which statement best describes a difference between a molecule of DNA and a molecule of RNA?
Naddika [18.5K]

Answer: B

Explanation:

6 0
3 years ago
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