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Genetics

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

78,342 Questions

What is a random change in DNA called?

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A random change in DNA is called a mutation. Mutations can occur naturally during cell division, exposure to environmental factors like radiation or chemicals, or errors in DNA replication. These changes can lead to genetic variation and may have different effects on an organism.

What are the usage of F1 and F2?

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F1 is typically used to open a help menu in various programs, while F2 is commonly used to rename files or folders in file explorers and desktop environments. Both keys may have different functions depending on the specific software or operating system you are using.

What is the meaning of stage controls in microsope?

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Stage controls on a microscope are mechanisms that allow the user to move the stage (where the slide is placed) horizontally and vertically to position the specimen for viewing. These controls are essential for adjusting the position of the specimen under the objective lens for accurate observation and focusing.

What called the division of cell into approximately two equal parts?

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Cytokinesis is the process of dividing a cell into two equal parts during cell division. This ensures that each daughter cell receives an equal amount of cellular components.

Which lipids will you find associated with the Cell membranes and the organelles of Cells?

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Phospholipids are the most abundant lipid found in cell membranes, forming a lipid bilayer. Cholesterol is also present in cell membranes, helping to maintain membrane fluidity. Additionally, certain organelles like the endoplasmic reticulum and Golgi apparatus contain lipids such as phospholipids and cholesterol in their membranes.

Which areas in the DNA contain repeated segments?

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Repeated segments can be found in various regions of DNA, including telomeres, centromeres, and certain satellite DNA sequences. These repetitive elements are often involved in important cellular processes such as chromosome stability and gene regulation. Additionally, repeat expansions in certain regions of the genome are associated with genetic disorders.

What type of controls take the form of barriers and guards or signs to warn individuals?

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Physical controls include barriers, guards, and warning signs to prevent access to hazardous areas or to inform individuals about potential risks. These controls physically reinforce safety measures and help mitigate potential hazards in the workplace.

What is the effect of isotonic saline solution on RBC?

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Isotonic saline solution has no net effect on red blood cells (RBCs) as it has the same osmolarity as blood. This means that RBCs will neither shrink (crenate) nor swell (lyse) when placed in isotonic saline solution. The solution maintains the normal shape and function of the RBCs.

Can mother and father with o blood type have an o negative child?

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Yes, it is possible for parents with O blood type to have an O negative child if both parents are carriers of the Rh negative factor. The child inherits one gene from each parent, so there is a chance for the child to be O negative if both parents pass on the Rh negative gene.

What is rRNA transcribed from?

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rRNA is transcribed from genes located in the nucleolus of the cell. It is transcribed by RNA polymerase I.

Does mature red blood cells have chromosomes?

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No, mature red blood cells do not have a nucleus or any DNA, including chromosomes. They eject their nucleus as part of the maturation process to make more space for hemoglobin, the oxygen-carrying protein in red blood cells.

What does a paired statement key consist of?

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A paired statement key consists of a key-value pair, where a key identifies the statement or data element, and the value provides the corresponding information or data associated with that key. These pairs are commonly used in various data structures such as dictionaries, objects, or maps.

Why bacterias are not used in gene therapy?

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Bacteria are not commonly used in gene therapy because they can trigger unwanted immune responses in the body. Additionally, bacteria may also contain their own genetic material that can interfere with the therapeutic gene. Instead, viruses are often used as delivery vectors in gene therapy due to their ability to efficiently deliver genetic material into cells.

How are characteristics passed?

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Characteristics are passed down from parents to offspring through genetic material, such as DNA. Offspring inherit a combination of traits from both parents, resulting in a unique set of characteristics that define the individual. Genes determine specific traits, such as hair color, eye color, and height, which are passed from one generation to the next.

What affects semipermeable membranes?

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Semipermeable membranes can be affected by factors such as temperature, pressure, pH, and the size and charge of molecules attempting to pass through. Changes in these factors can impact the permeability of the membrane and its ability to selectively allow certain substances to pass while restricting others.

The collar cells of sponges are similar to?

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The collar cells of sponges are similar to choanocytes, which are specialized cells found in both sponges and some types of colonial protozoa. These cells have a collar-like structure with a flagellum that helps in creating water currents to bring in food particles for the sponge to consume.

When the concentration is higher on the outside of the cell it is?

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When the concentration is higher on the outside of the cell, it creates a concentration gradient that drives passive transport processes like diffusion and osmosis. This gradient allows molecules or ions to move from an area of higher concentration to an area of lower concentration, resulting in the equalization of concentrations inside and outside the cell.

What would happen to cells in a hypothetical cell line if mitosis occurs every 10 hours but cytokinesis occurs every 20 hours?

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The cells would continuously duplicate their DNA during mitosis but would not be able to divide into two separate cells due to the delayed cytokinesis. This would result in the accumulation of cells with multiple nuclei, leading to increased genetic material and ultimately cell death or abnormal function due to the lack of proper division.

Is active transport not spontaneous?

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Active transport is not spontaneous because it requires energy input to move substances against their concentration gradient. This process is driven by specific transporter proteins in the cell membrane that utilize ATP to pump molecules across the membrane. Unlike passive transport, which occurs spontaneously with the concentration gradient, active transport is a non-spontaneous process.

What is a single cell function?

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A single cell function refers to the specific task or role that a single cell performs within an organism. This can include functions such as respiration, reproduction, or transport of nutrients. Each cell contributes to the overall functioning of the organism by carrying out its designated function.

What organelle was important in classifying cells as either a plant or an animal cell?

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The presence of chloroplasts is an important organelle in classifying cells as plant cells, while the absence of them is a distinguishing feature of animal cells. Other organelles, such as the cell wall in plants and centrioles in animal cells, also help differentiate between the two types.

What domain consists mainly of organisms made up of many cells?

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The domain Eukarya consists mainly of organisms made up of many cells. Eukaryotic cells have a membrane-bound nucleus and other organelles. Examples of organisms in this domain include plants, animals, fungi, and protists.

Does plant have a cell wall of cellulose?

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Yes, plants have cell walls made of cellulose. Cellulose is a complex carbohydrate that provides structural support to plant cells, helping them maintain their shape and rigidity.

What nitrogenous base is unique to rna molecules?

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RNA bases are: adenine and uracil & guanine and cytosine.

DNA bases are: adenine and thymine & guanine and cytosine.

The main difference is the uracil and thymine. Hope this helps...