Magine that a chromosome contains the following chromosome order: ZYXWVUT. What type of mutation happens to produce ZYXWWVUT?
Aneuploidy is the type of chromosomal mutation that is responsible for causing Turner syndrome.
Aneuploidy is a type of chromosomal mutation in which there is presence of an abnormal number of chromosomes in a cell. The chromosomes may be incomplete (missing) or excessive (extra). For example, if a human cell had 42 sex chromosomes instead of 46, or it had 48 chromosomes instead of 46, it is said to be anueploidic in nature. Aneuploidy occurs during cell division when there is improper separation of the chromosomes between the two cells. Aneuploidy is responsible for many genetic disorders including Turner syndrome.
Anonymous 5 years ago A molecule that can be used as a molecular clock has a neutral mutation rate of one mutation per 5 million years. How many years ago did two species share a common ancestor if the molecules found in these two species differ by a total of eight mutations? Answer a) 1.5 million years b) 10 million years c) 20 million years d) 40 million years
The right option is; B)missense
Missense mutation is the type of mutation that causes sickle cell anemia
A missense mutation is a type of nonsynonymous substitution in which the change of a single nucleotide (base pair) influences the genetic code and results in a codon that code for a different amino acid. This type of mutation can affect the function of the protein, and it is responsible for human diseases such as, sickle-cell anemia and Epidermolysis bullosa.
Which is an agent that caused a mutation in DNA and chromosomes? Options: A) nondisjunction B) karyotype C) mutagen D) phenotype Need answer asap
B) missense – means that it changes just one base pair
C) nonsense – changes something to a stop code and messes up the whole chain
D) insertion – adds a letter
so its A because you said “but during translation the iRNA strand still creates the same protein” so even though the mutation occurred the outcome was still the same.
When a mutation occurs by elimination of one base in a dna sequence, this mutation is called a ________. frameshift mutation insertion mutation substitution mutation translocation mutation viral mutation?
Yes, it is probable for a person’s future
children to inherit this kind of mutation. There is a one
in two possibility to inherit this. Cells that are already destroyed permanently by the cancer will divide further
even though there is cancer fighting techniques or cocktails induced. The mutation may either be a recessive trait or a major trait
depending on the genetic code of the mutation.
25) Answer is: less metallic and more nonmetallic.
Electronegativity increases from left to right across a period, atoms have tendency to attract electrons.
Electronegativity (χ) is a property that describes the tendency of an atom to attract a shared pair of electrons.
26) Answer is: radioisotope.
Radioisotope has an unstable atomic nucleus and emit energy and particles when it changes to a more stable form.
Francium (Fr) is element with atomic number 87 (87 protons and 87 electrons).
27) Answer is: boils.
Boiling is the temperature at which the vapour pressure of the liquid is equal to the pressure exerted on the liquid by the surrounding atmosphere.
The Celsius scale was based on 0°C for the freezing point of water and 100°C for the boiling point of water at 1 atm pressure.
28) Answer is: endothermic.
There are two types of reaction:
1) endothermic reaction (chemical reaction that absorbs more energy than it releases, ΔH>0).
2) exothermic reaction (chemical reaction that releases more energy than it absorbs).
For example, the breakdown of ozone is an endothermic process. Ozone has lower energy than molecular oxygen (O₂) and oxygen atom, so ozone need energy to break bond between oxygen atoms.
29) Answer is: kinetic.
The average kinetic energy of molecules depends on the temperature.
As temperature increases, molecules gain more energy from surrounding and move faster.
Kinetic energy (standard unit is the joule J) depends on speed of the molecule.
Solid gains kinetic energy to become a liquid and then becomes a gas.
30) Answer is: alpha particles.
This was famous Rutherford’s Gold Foil Experiment: he bombarded thin foil of gold with positive alpha particles.
Rutherford observed the deflection of alpha particles on the photographic film.
Alpha particles are helium atom particles, consist of two protons and two neutrons.
According to Rutherford model of the atom: atoms have their charge concentrated in a very small nucleus.
31) Answer is: highest.
For example, calcium oxide.
Calcium oxide (CaO) has ionic bonds between calcium cations (Ca²⁺) and oxygen anions (O²⁻).
Because it has strong ionic bonds, it has high melting point (around 2600°C).
Ionic bond is the electrostatic attraction between oppositely charged ions (cations and anions).
32) Answer is: a scientific model.
A scientific model is a representation of an idea, an object, a process or a system that is used to describe and explain phenomena that cannot be experienced directly.
33) Answer is: the superscript is mass number and the subscript is atomic number.
Atomic number(Z) is the number of protons, which is characteristic of a chemical element..
Mass number (A) is the total number of protons and neutrons in a nucleus.
The right answer is D.
Meiosis consists of two successive cell divisions that will give birth to gametes.
After the meiosis, the original cell gave birth to four haploid cells whose genomes were recombined in a unique way.
In humans, the cells that will participate in meiosis are spermatocytes and oocytes.
In the cells that will enter into meiosis, the replication of A.D.N. occurred during interphase, each chromosome consists of 2 chromatids connected by their centromere. (Each chromatide is formed of a double-stranded A.D.N molecule and molecules that maintain its structure)
Correct answer: C). Genetically different haploid cells
Meiosis is a type of cell division in which four haploid cells are produced, which are genetically different from the parent. It reduces the chromosome number exactly half as contained in the parent. That is why it is called as a reductional division.
In the first round of meiosis I homologous pairs of chromosome separate and the sister chromatids separate during meiosis II.
The correct answer to this would be:
“inability of many medium ground finches to feed on large,
The medium ground finches feed on seeds. However, the birds
have two variations in the bill shape: some birds have wide, deep bills while others
have thinner bills. The large-billed birds feed more proficiently on large,
hard seeds, while the smaller billed birds feed more proficiently on small,
soft seeds. The reduction in number started in 1977, when a drought period
altered vegetation on the island. Due to this event, the number of seeds
declined dramatically; the decline in small, soft seeds was larger than the
decline in large, hard seeds. The large-billed birds were able to endure better
than the small-billed birds thus resulting in decline in number.
The correct answer would be B. CO, which comes from fossil fuel–powered engines, such as cars.
As the name suggests the primary pollutant is defined as the pollutant emitted directly from the source. For example, carbon monoxide which is produced due to incomplete combustion is emitted directly from cars, buses et cetera.
In contrast, secondary pollutant refers to the pollutant which is formed after reacting with other pollutants in the atmosphere. For example, nitrogen dioxide which is formed when NO reacts with oxygen, acid rain which is formed when nitrogen dioxide and sulfur dioxide reacts with water present in atmosphere et cetera.
A specific mutation in a certain animal leads to abnormal development of the heart and kidney, resulting in miscarriage. Why did this happen?