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3 years ago

How many dna molecules are in each somatic cell?

Biology

2 answers:

STALIN [3.7K]3 years ago

5 0

There are 46 DNA molecules in each somatic cell.

NeX [460]3 years ago

5 0

46<span>Think carefully, now. How many DNA molecules are in each of your somatic cells? BEFORE replication, the normal amount (46 chromosomes)
AFTER replication and BEFORE division (made copies, but not divided up) so you have 92 DNA molecules, but 46 replicated chromosomes.

</span>

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We identify nucleic acid strand orientation on the basis of important chemical functional groups. These are the _________ group

Alina [70]

Answer: Option B) phosphate; hydroxyl; 3'

We identify nucleic acid strand orientation on the basis of important chemical functional groups. These are the phosphate group attached to the 5' carbon atom of the sugar portion of a nucleotide and the hydroxyl group attached to the 3'

carbon atom

Explanation:

For both RNA and DNA, chemical groups such as phosphate (PO3-) attaches to the 5' carbon of the pentose sugar (deoxyribose in DNA, ribose in RNA).

While hydroxyl group (OH) attaches to the 3' carbon atom of the pentose sugar.

Thus, a nucleic acid structure structure reveals a several repeating units of nucleotides where nitrogenous base links to a pentose sugar, who in turns is linked to phosphate group

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3 years ago

Use the drop-down menus to answer the questions about genetic recombination. involves the transfer of genetic material from one

Tresset [83]

The right matches are:

• Involves the transfer of genetic material from one bacteria to another ==> Genetic recombination (all 3).

• Involves scraps of genetic material ==> Transformation.

• Uses a virus to transmit genetic material ==> Transduction.

• Uses a pilus to transmit genetic information ==> Conjugation.

• Introduces new genetic material to a bacterium ==> Genetic recombination (all 3).

In molecular biology the term genetic recombination is often used as a synonym for DNA recombination, that is, the processes by which one DNA (or RNA) molecule is cut off, then joined to another.

There are three possible mechanisms in the bacterium: bacterial conjugation, bacterial transformation and transduction.

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3 years ago

Two fruit flies that are heterozygous for body color and eye color are crossed. Brown body color is dominant to black body color

Debora [2.8K]

Hi!

<h3>Let us assume that the following key:</h3>

<em>Brown Body Color</em> (Dominant) : B

<em>Black Body Color</em> (Recessive) : b

<em>Red Eye Color</em> (Dominant) : R

<em>Brown Eye Color </em>(Recessive) : r

To predict all possible phenotypes for this cross, you need to make a Punnet Square, which makes it easier to solve dihybrid crosses (crosses involving two different traits).

The concept of this is taking each combination of the traits from the parent (BR, Br, br, bR), and crossing it with such combinations of the other parent.

<em>Refer to the attached picture for clarity.</em>

This cross will yield a phenotypic ratio of

9 : 3 : 3 : 1

9 Dominant for both traits

3 Dominant for Eye Color, and Recessive for Body Color

3 Dominant for Body Color, and Recessive for Eye Color

1 Recessive for both traits

<h3><u>All Genotypes with Corresponding Phenotype:</u></h3>

BBRR - Brown Body, Red Eyes

BBrR - Brown Body, Red Eyes

BBRr - Brown Body, Red Eyes

bBRR - Brown Body, Red Eyes

BbRR - Brown Body, Red Eyes

BBrr - Brown Body, Brown Eyes

bBrR - Brown Body, Red Eyes

bBRr - Brown Body, Red Eyes

BbrR - Brown Body, Red Eyes

BbRr - Brown Body, Red Eyes

bBrr - Brown Body, Brown Eyes

Bbrr - Brown Body, Brown Eyes

bbRR - Black Body, Red Eyes

bbrR - Black Body, Red Eyes

bbRr - Black Body, Red Eyes

bbrr - Black Body, Brown Eyes

4 0

3 years ago

Read 3 more answers

Is my answer correct??

valentinak56 [21]

Answer:

Nope

Explanation:

Option A will be the answer

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3 years ago

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What does labor need contractions for

zvonat [6]

Answer:

A contraction is when the muscles of your uterus tighten up like a fist and then relax. Contractions help push your baby out. simple as that

Explanation:

7 0

3 years ago