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Vinil7 [7]
3 years ago
14

When during the cell cycle do chromosomes first become visible?

Biology
1 answer:
Aleks [24]3 years ago
3 0

Answer:

chromosomes become visible during C)Prophase

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Which of the following is a cause of a DNA mutation?
Reika [66]
DNA Mutation is caused by the alteration of single base units in DNA, or the deletion, insertion, or rearrangement of larger sections of genes or chromosomes. Thus, the correct answer is option D.

1.DNA Mutations are caused by environmental factors known as mutagens.

2.Types of DNA mutagens include radiation, chemicals, and infectious agents.

3.DNA Mutations may be spontaneous in nature.
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2 years ago
At which boundary does subduction stop occurring, resulting in a mountain range?
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Continental boundary.
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Energy moves in the form of energized.......?
insens350 [35]
 <span>Actually energy is the capacity to do work. It is not moving. It is transmitted, propagated, dissippated, or radiated. It depends upon what type of energy it is. Heat energy is dissippated through conduction, convection or radiation. For conduction the particles must be in contact. For convection the particles which posses the energy must ba able to move about. For radiation, even without a material medium the energy is transmitted in the form of waves. Eg. energy from the sun. When a stone is dropped in still water the energy is imparted to the water surface. This energy is distributed all over the water surface in the form of circular waves (ripples). Electrical energy - through conducting wires or electromagnetic radiation. Light energy & sound energy are through waves.</span>
3 0
3 years ago
Albinism in humans is caused by homozygosity for mutant recessive alleles of the tyr gene, which is located on chromosome 11. al
yanalaym [24]
Exactly 989527/1048576, or approximately 94.37%  
Since each trait is carried on a different chromosome, the two traits are independent of each other. Since both parents are heterozygous for the trait, each parent can contribute 1 of a possible 4 combinations of the alleles. So there are 16 possible offspring. I'll use "a", "A", "b", "B" to represent each allele and the possible children are aabb, aabB, aaBb, aaBB, aAbb, aAbB, aABb, aABB, Aabb, AabB, AaBb, AaBB, AAbb, AAbB, AABb, and AABB 
Of the above 16 possibilities, there are 7 that are homozygous in an undesired traint and 9 that don't exhibit the undesired trait. So let's first calculate the probability of "what are the chances that all 5 children not exhibiting an undesired trait?" and then subtract that result from 1. So 
1-(9/16)^5 = 1 - 59049/1048576 = 989527/1048576 which is approximately 0.943686485 = 94.3686485%  
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8 0
3 years ago
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Biological control methods for managing insect pests are effective for reasons that include which of the following? They promote
Semenov [28]

Answer:

Option B, They generally focus on one target insect to ensure that the target insect population remains low.

Explanation:

Biological pest control methodologies are focused towards a specific species of pest and do not harm the non-targeted species. These methods are environment friendly and do not produce any harmful residues. Also they do not develop any kind of resistance in species due to which the same bio pesticide can be used again and again. Since these methods have high specificity, they may require usage of two or more bio pesticides all together.  

Hence, option B is correct

4 0
3 years ago
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