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Genetics

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

500 Questions

What does the value does not match the pattern AA on a ross application -?

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Asked by Wiki User

The value does not match the pattern aa. On victo secret

What will be the wing length of the F1 offspring?

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Asked by Wiki User

The wing length of the F1, offspring is Long! thank me later ๐Ÿ˜˜

Is colon cancer dominant or recessive?

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Asked by Wiki User

Colon cancer is not classified as either dominant or recessive. Instead, it is considered a complex disease influenced by multiple factors, including genetic, environmental, and lifestyle factors.

Genetic Factors: While some cases of colon cancer can be linked to specific genetic mutations that are inherited in a dominant or recessive pattern, many cases are due to a combination of genetic variations that increase the risk of developing the disease. For example, mutations in genes such as APC, MLH1, MSH2, MSH6, PMS2, and STK11 can increase the risk of hereditary colorectal cancer syndromes, such as familial adenomatous polyposis (FAP) or Lynch syndrome (hereditary nonpolyposis colorectal cancer, HNPCC).

Environmental and Lifestyle Factors: Environmental factors such as diet, physical activity, smoking, alcohol consumption, and exposure to certain carcinogens can also significantly influence the risk of developing colon cancer. Lifestyle choices and environmental exposures can interact with genetic predispositions to increase or decrease the risk of developing the disease.

Complex Inheritance: The inheritance pattern of colon cancer is complex and varies depending on the specific genetic mutations involved. Some mutations may follow an autosomal dominant pattern, where inheriting a single copy of the mutated gene from one parent can increase the risk of developing cancer. In contrast, other mutations may follow a recessive pattern, requiring two copies of the mutated gene (one from each parent) to significantly increase the risk.

Therefore, colon cancer is better understood as a multifactorial disease influenced by a combination of genetic, environmental, and lifestyle factors, rather than being classified as strictly dominant or recessive in inheritance.

In any given 3mm of blood what is the approximate ratio of the number of red blood cells erythocites to white blood cells leukocytes?

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Asked by Wiki User

There are about a thousand times as many red blood cells as white cells.

Consider that the red blood cells (or erythrocytes) in a mm3 (or microliter) of blood number about five million in an average man (a few less in a woman). The white blood cells (or leukocytes) number only 5-6 thousand per mm3 so the ratio is about a thousand fold.

What is complimentary training?

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Asked by Wiki User

Complimentary training is next step of training after fundamental training. It is stage of training when the trainees are divided into regiment or departments and trained for their actual goal.

Cancer-causing viruses are known as?

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Asked by Wiki User

Cancer-causing viruses are known as oncogenic viruses or tumour viruses. These viruses can integrate their genetic material into the host cell's DNA, disrupting normal cellular functions and promoting uncontrolled cell growth, which can lead to the development of cancer. Examples of oncogenic viruses include human papillomavirus (HPV), hepatitis B virus (HBV), hepatitis C virus (HCV), Epstein-Barr virus (EBV), and human T-cell lymphotropic virus (HTLV). These viruses can cause various types of cancer, such as cervical cancer (HPV), liver cancer (HBV and HCV), nasopharyngeal carcinoma (EBV), and adult T-cell leukaemia/lymphoma (HTLV).

Would your hair go curly if you plaited it?

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Asked by Wiki User

If you have straight hair and you plait it, it is possible that your hair might become temporarily wavy or curly once you undo the plaits.

Plaiting or braiding the hair can create waves or curls because it introduces twists and bends into the hair strands.

When you plait straight hair, the hair is folded and twisted, and this can cause the hair to take on a different shape.

The longer you keep the plaits in place, the more pronounced the wave or curl pattern is likely to be when you remove them.

However, it's important to note that the extent to which the hair becomes curly or wavy will vary depending on several factors, including your hair type, thickness, and natural texture. Some individuals may see more noticeable results with plaiting, while others may experience minimal changes or none at all.

Who is mathiew schlider?

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Asked by Wiki User

A Botonist and Scientist that concluded that all plants are made up of cells

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

Cancer cells reproduce rapidly due to several factors related to their altered biology:

Loss of Cell Cycle Control: Cancer cells often lose the normal regulatory mechanisms that control the cell cycle, the process by which cells grow and divide. This loss of control allows cancer cells to bypass checkpoints that would normally regulate cell division, leading to uncontrolled proliferation.

Increased Signaling for Growth: Cancer cells may exhibit increased signaling pathways that promote cell growth and division. Mutations or overexpression of genes involved in growth signaling, such as oncogenes, can drive rapid proliferation of cancer cells.

Resistance to Apoptosis: Cancer cells often evade apoptosis, the programmed cell death that occurs in response to cellular damage or stress. This allows cancer cells to survive and continue dividing even in adverse conditions.

Genomic Instability: Cancer cells frequently accumulate genetic mutations or chromosomal abnormalities that result in genomic instability. This instability can drive the acquisition of additional mutations that promote rapid proliferation and tumor progression.

Altered Metabolism: Cancer cells exhibit altered metabolism, favoring glycolysis (the breakdown of glucose) even in the presence of oxygen, a phenomenon known as the Warburg effect. This metabolic shift provides cancer cells with the energy and building blocks needed for rapid proliferation.

Angiogenesis: Cancer cells stimulate the formation of new blood vessels (angiogenesis) to supply nutrients and oxygen to the growing tumor. This enhanced blood supply supports the rapid proliferation of cancer cells by providing essential resources for growth and division.

Immune Evasion: Cancer cells may evade detection and destruction by the immune system, allowing them to proliferate unchecked. This immune evasion enables cancer cells to survive and continue dividing despite the body's attempts to control their growth.

Overall, cancer cells exhibit multiple adaptations that allow them to reproduce rapidly and sustain unchecked proliferation. These characteristics contribute to the aggressive growth and spread of tumors in the body.

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.