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Genetics

This section covers topics of genetics such as variation, pedigrees, Mendelian genetics and mutations.

500 Questions

What are the two properties that make up DNA?

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Asked by Wiki User

DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. It carries the genetic instructions that determine the biological development of an organism. There are two key properties that define DNA:

Double Helix Structure: DNA is made up of two strands that coil around each other in a shape known as a double helix. This twisted ladder-like structure is essential for DNA replication and protein synthesis. The sides of the ladder are made of sugar-phosphate backbones, while the rungs of the ladder are formed by complementary pairs of nitrogenous bases.

Where did the myth of Alexandria's genesis originate?

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Asked by Wiki User

It is an internet fable. From all research, this thing was started by a band of fiction writers. There is simply no basis, nor any listing in any medical research for this "genetic disorder". The loose time frame seems to be somewhere in the late 1980's.

What is the scientific name for a Witch?

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Asked by Rebekahlos

There is no scientific name for a witch as witches are fictional characters in folklore and mythology.

Is AA an homozygous or an heterozygous?

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Asked by Wiki User

AA could be either homozygous or heterozygous, depending on whether the individual inherited the same allele (A) from both parents (homozygous) or different alleles (Aa) from each parent (heterozygous).

What is the small ring of DNA in bacteria?

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Asked by Wiki User

Bacteria generally have one (and only one) circular chromosome. However, they can also contain smaller rings of DNA called plasmids. These plasmids are generally not essential to cellular functions, but serve a variety of purposes. For example, they can serve as cloning vectors.

RNA viruses are also called?

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Asked by Wiki User

Viruses with RNA as their genetic material are called retroviruses. They use the enzyme reversetranscriptase to transcribe their RNA genome into DNA, which is then inserted into the host's genome.

Why do cancer cells reproduce so rapidly?

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Asked by Wiki User

Here we propose that mutation of cancer cells and of tumorigenic cell lines in culture is due to chromosome reassortments and that reassortments at high rates are catalyzed by aneuploidy, an abnormal balance of chromosomes.

A cancer can continue to grow because cancer cells act differently than normal cells. Cancer cells are different from normal cells because they: divide out of control. are immature and don't develop into mature cells with specific jobs.

What are the three points of the cell theory?

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Asked by Wiki User

1) all living things are composed of cells

2) cells are the basic units of structure and function in an organism

3)cells come only from the reproduction of existing cells

How is ACTH production controlled?

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Asked by GaleEncyofMedicine

ACTH production is primarily regulated by the hypothalamus and pituitary gland through a feedback mechanism. The hypothalamus releases corticotropin-releasing hormone (CRH) in response to stress or low cortisol levels, which then stimulates the pituitary gland to release ACTH. ACTH, in turn, stimulates the adrenal glands to produce cortisol. When cortisol levels are high, negative feedback mechanisms reduce the production of CRH and ACTH, thus maintaining hormonal balance.

Is Aa and AA a dominant phenotype?

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Asked by Wiki User

Yes, both Aa and AA genotypes represent the dominant phenotype for a specific trait. The presence of at least one dominant allele (A) will result in the dominant phenotype being expressed.

What is genotype AA?

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Asked by Wiki User

Genotype AA refers to an individual who has two copies of the A allele for a particular gene. In genetics, genotypes are the specific combination of alleles an organism carries for a particular trait. In this case, the individual would express the trait associated with the A allele.

Can scientists combine the DNA from an animal with a human?

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Asked by Wiki User

It is theoretically possible to combine animal DNA with human DNA, but it raises significant ethical and safety concerns. Such experiments are generally prohibited due to the risks involved and the potential for creating unpredictable and ethical dilemmas.

Does amylase use cellulose as a substrate?

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Asked by Wiki User

No, amylase does not use cellulose as a substrate. Amylase is an enzyme that breaks down starch into simple sugars like maltose and glucose. Cellulose is a complex carbohydrate that requires other enzymes, like cellulase, for its breakdown.

What makes plant cell more rigid than animal cell?

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Asked by Wiki User

Plant cells have a rigid cell wall made of cellulose that provides structural support, while animal cells do not have this feature. The cell wall allows plant cells to resist osmotic pressure and maintain their shape, giving them a more rigid structure compared to animal cells.

How can you tell if you are going to be hairy?

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Asked by Wiki User

Genetics plays a significant role in determining how hairy a person will be. If your family members have significant body hair, there is a higher likelihood that you will also develop more hair. Hormonal factors can also influence hair growth, so if you're experiencing hormonal changes, you may notice an increase in hair.

What are the 8 characteristics of life?

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Asked by Wiki User

1. 1+ cells

2. displays organization

3. grows and develops

4. reproduces

5. responds to stimuli

6. requires energy

7. maintains homeostatis

8. adapts

Chromosomes first become visible during which phase of mitosis?

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Asked by Wiki User

Chromosomes first become visible during prophase of mitosis when they condense and coil up tightly. This allows them to be easily seen under a microscope as separate structures.

How successful is highly active antiretroviral therapy?

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Asked by GaleEncyofMedicine

Highly active antiretroviral therapy (HAART) has been very successful in treating HIV, leading to significant reductions in viral load, improvement in immune function, and increased life expectancy for individuals living with the virus. When taken consistently and correctly, HAART can suppress the virus to undetectable levels, greatly reducing the risk of HIV transmission and improving the overall health and quality of life for people with HIV.

In 'A Separate Peace' how does Gene feel about his actions in the tree?

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Asked by Wiki User

Gene feels guilty and conflicted about his actions in the tree where he causes his friend Finny to fall and injure himself. He struggles with the realization that his jealousy and insecurities played a part in causing harm to his friend. This incident leads Gene to confront his own inner demons and ultimately seek forgiveness.

What is the largest taxonomic category in linnaeus's system?

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Asked by Wiki User

The largest taxonomic category in Linnaeus's system is the kingdom. This category includes all living organisms and is further divided into smaller categories like phylum, class, order, family, genus, and species.

Why do cells appear different colors when you look at them under a microscope?

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Asked by Wiki User

Cells can appear different colors under a microscope due to the staining techniques used to highlight specific cellular structures or components. Stains interact with different cellular components, causing them to reflect or absorb light in a way that produces color. This helps researchers visualize and distinguish between different structures within the cell.

What is the name given to grouped laboratory work that represents those tests commonly done together?

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Asked by Wiki User

A battery of tests is commonly used to describe grouped laboratory work where multiple tests are performed together. These tests are often related and provide a comprehensive view of a particular aspect of health or disease.

What is the difference between PCR-genital testing and STD testing?

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Asked by Wiki User

PCR-genital testing is a specific type of test that uses polymerase chain reaction (PCR) technology to detect the presence of genetic material from pathogens in genital samples. STD testing, on the other hand, is a more general term that refers to a range of tests used to diagnose sexually transmitted infections (STIs) through various methods, including blood tests, urine tests, and swabs. PCR-genital testing is a more targeted approach that may be used as part of an STD testing regimen to detect specific pathogens in the genital area.

What are essential cells of the lung performing its main function are the pulmonary?

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Asked by Wiki User

The essential cells of the lung that perform its main function are the alveolar cells, including type 1 pneumocytes for gas exchange and type 2 pneumocytes for surfactant production. Other important cells include macrophages for immune defense and ciliated epithelial cells for airway clearance.

Name two molecules which alternate to make the upright or side portion of a DNA molecule?

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Asked by Wiki User

The two molecules that alternate to form the backbone of a DNA molecule are deoxyribose sugar and phosphate groups. These molecules form a repeating pattern along the length of the DNA strand, with the nitrogenous bases (adenine, thymine, cytosine, and guanine) attached to the deoxyribose sugar molecules.