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Ad libitum [116K]
4 years ago
13

How many sex chromosomes does a normal human somatic cell contain?

Biology
2 answers:
ANEK [815]4 years ago
5 0

Answer:

The answer is 2.

Explanation:

In human somatic cells, there are 23 pair (2n) of chromosomes, and there are 23 pairs in all cells except in gametes. Of the 23 pair in somatic cell, 22 pair are autosomes, while two are sex chromosomes.

Please mark me brainliest! :D

kondaur [170]4 years ago
3 0

Answer: Human have 46 sex chromosomes.

Explanation:

Human sex chromosomes are the chromosomes that determine the sex of an individual either male or female and are different from autosomes because of their size. Human sex chromosomes are diploid in somatic cells

They are 23pairs of chromosomes or 46 chromosomes.

The female have 46 XX chromosomes and the male have 46 XY chromosomes.

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The sequences at the ends of linear chromosomes are called _______________. A protein that uses ATP hydrolysis to separate the t
Nutka1998 [239]

Answer: Telomeres, Helicases, Okazaki, DNA polymerase, Topoisomerase

Explanation:

1. Telomeres these are set of repetitive nucleotide sequence found at the end of a linear chromosomes they help preventing the DNA chromosome frrom sticking to other DNA chromosomes.

2. Helicases are proteins that uses energy (ATP) to unwind DNA strands during replication.

3. Okazaki fragments the small DNA nucleotide sequence synthesized separately on the lagging strand.

4. DNA polymerase are enzymes that catalyzes the addition of deoxyribonucleotides to DNA during replication.

5. Topoisomerase are enzymes that prevent single stranded DNA from supercoil, rumple and winding back during replication.

8 0
3 years ago
The two members used in the construction of an aircraft fuselage are joined together using a 30° fish-mouth weld. Determine the
Leya [2.2K]

This question is incomplete because it lacks the required diagram of the fuselage. Please find attached to this answer the appropriate diagram.

Answer:

The average normal stress on the plane of each weld = 66.7 psi

The average shear stress on the plane of each weld = 115.5 psi

Explanation:

From the question, we are told that two members are joined together.

From the diagram we see 800lb.

Since there are 2 members = 800lb/2

= 400lb

a) The formula for average nor umal stress on the plane of each weld = Force (in Newton)/ Cross sectional area (in inches)

From the question, we are assuming that the horizontal force = 400lb

We are given an angle of 30°

Therefore, the resultant force in Newton = F sin θ

= 400 sin 30 = 200lb

Cross sectional area = A/sin θ

= 1 × 1.5/ sin 30

= 3 in²

The average normal stress on the plane of each weld is calculated as:

200lb/3 in²

= 66.7lb/in² or 66.7 psi

b) The average shear stress on the plane of each weld = Force (in Newton)/ Cross sectional area (in inches)

Resultant force =  F cos θ

= 400 cos 30 = 346.41016151lb

Approximately = 346.41lb

Crossectional area = 3 in²

The average normal stress on the plane of each weld is calculated as:

346.4lb/3 in²

= 115.47Ib/in²

Approximately = 115.5Ib/in²

Therefore,

The average normal stress on the plane of each weld = 66.7 psi

The average shear stress on the plane of each weld = 115.5 psi

3 0
3 years ago
Which law might require you to do some math calculations?
Vadim26 [7]

Answer:

Law 2

Explanation:

Newton's Second Law of Motion states that the acceleration of a physical object is directly proportional to the net force acting on the physical object and inversely proportional to its mass.

Mathematically, it is given by the formula;

Force = mass * acceleration

Hence, Law 2 might require you to do some math calculations.

For example, an object having a mass of 20kg is pushed by John and it then accelerates down the inclined plane at a rate of 0.5m/s². Find the force applied on the object.

Given the following data;

Mass = 20kg

Acceleration = 0.5m/s²

To find the force;

Force = mass * acceleration

Substituting into the equation, we have;

Force = 20 * 0.5

Force = 10 Newton.

5 0
3 years ago
BRAINLIEST! DECENTLY EASY
damaskus [11]

Answer:pre-formed structures and chemicals, and by infection-induced responses of the immune system.

Explanation: brainliest?

3 0
3 years ago
The outer cortex of the brain contains the cell bodies of cerebral neurons and known as gray matter. true false
LUCKY_DIMON [66]

Answer:

true

hope this helps! <3

4 0
2 years ago
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