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3 years ago

Mark the genotypes which express hemophilia. (answer(s) can be more than 1)

Biology

2 answers:

Ugo [173]3 years ago

6 0

the answer is YY^b,XX^b,X^bX^b, and X^by

balandron [24]3 years ago

3 0

Answer:

Option B and E

Explanation:

Hemophilia is a sex linked or X -linked recessive genetic disease. Both the X allele in a female must be hemophilic else the female would only be the carrier.

Let’s say if the genotype of a female is XhXh , where Xh signifies affected allele then the female will be having Hemophilia

If any of the X allele in a female ‘s genotype is unaffected, then the female will be just a carrier. Thus, such a female would have XHXh, where XH signifies unaffected allele.

Like wise a affected male will have XhY genotype.

Thus, option B and E are correct.

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<h2>Description of muscle tissues. </h2>

Explanation:

There are three types of muscle tissue are cardiac, smooth, and skeletal.

1. Cardiac muscle tissue: It is located in the walls of the heart.

They appear striated.

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Function: To pump blood through the blood vessels in your body.

2. Smooth muscle tissue: It is located in walls of hollow visceral organs, except the heart.

They appear spindle-shaped.

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Function: To move food through the digestive tract.

To regulates air flow in lungs.

3. Skeletal muscle tissue: It occur in muscles which are attached to the skeleton.

They appear striated.

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Function: To support the body.

It makes bones and other body parts move.

Cell shape : There are different shapes of cells which are as follows:

1. Squamous 2.Cuboidal 3. Columnar 4. Polygonal 5. Stellate

6. Spheroid 7. Discoid 8. Fusiform 9. Fibrous.

Muscular layer: The muscular layer is present in many organs in the vertebrate body.

It is responsible for peristaltic movement in body.

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1. Inner 2. Outer layer.

Inner layer: The muscle of the inner layer is arranged in circular rings around the tract.

Outer layer: the muscle of the outer layer is arranged longitudinally.

Intercellular connections or junctions: These are the structures which provide adhesion and communication between cells.

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1. Tight junctions: It help to stop substances from leaking across a tissue.

2. Adhering junctions: It perform the function of cementing so as to keep neighbouring cells together.

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2 years ago