1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Assoli18 [71]
3 years ago
11

Inversion of DNA sequences within chromosomes is a common process in evolution. The following gene arrangements in a particular

chromosome are found in four different species:
First sequence: ABCDEF
Second sequence: ABFEDC
Third sequence: FEDABC
Fourth sequence: ADEFBC

Assuming that the arrangement in the first sequence is the ancestor/reference arrangement, in what evolutionary order did the four species arise, such that the fewest number of inversions occur between each species (place the first sequence as the earliest species in your ordering)?
Biology
1 answer:
Maksim231197 [3]3 years ago
5 0

Answer:

The correct answer is "Fist sequence; Fourth sequence; Second sequence; Third sequence".

Explanation:

Inversion of DNA is a process that often occurs during evolution of chromosomes. It occurs when the breakage of a chromosome in two places, results in the reinsertion of a DNA but in a reversed fashion. The evolutionary order of predecessors of inversion of DNA can be established by looking on the number of nucleotides that are different in the sequences of DNA. In this case, the first sequence is the ancestor and it haves the sequence "ABCDEF". The second in the evolutionary order is the fourth sequence since it originates from the first sequence only by changing the "BC" nucleotides to the end of the sequence "ADEFBC". The third in the evolutionary order is the second sequence since it still starts in AB, but has the other four nucleotides different: "ABFEDC". The last in the evolutionary order is the third sequence, which is completely different and reversed respect to the first sequence: "FEDABC".

You might be interested in
Pls answer its due soon!!!
pickupchik [31]

Explanation:

Meiosis makes genetic variety possible. It makes sperm & egg cells called gametes. Each gamete has 23 chromosomes. To make a diploid cell two gametes (sperm & cell) come together.

During prophase 1 the chromosomes pair up with their homologous pairs so they can transfer their genetic information and exchange it between each other. It makes recombinant chromosomes that influence the genetic diversity between the same people.

Now they are in metaphase 1, the chromosomes are in pairs in the middle of the cell. In anaphase 1, the chromosomes are pulled away by the spindle fibers. Then in telophase 1, there are two formed nuclei. Cytokinesis 1 then splits the cytoplasm.

Now they are in meiosis 2. During prophase 2, there are chromosomes and the spindles are starting to form again without crossing over like in prophase 1. In metaphase 2, chromosomes are going to line up in the middle in both cells unlike during metaphase 1 where the chromosomes were only in pairs.  In anaphase 2, only the chromatids are being pulled away by the spindle fibers. Next in telophase 2 the nuclei reform and the 2 cells are each going to divide into 4 cells. Finally, cytokinesis completely splits the cytoplasm.

Keeping in mind that each sex only produces one type of gamete cell (sperm or eggs), and of the independent assortment and crossing over of chromosomes, the end result will be diversity.

5 0
3 years ago
Which of the following does not characterize the lungs of birds?
kompoz [17]

Answer:

C) They are compressed during inhalation.

Explanation:

Birds breathe through rigid lungs that are located in the animal's thoracic region. The trachea of birds divides into bronchi that branch inside the lungs into very thin tubes called parabronchials or parabroncholes, which are irrigated by blood capillaries that allow gas exchange.

In birds there are no pulmonary alveoli (as in mammals), but air capillaries that depart from the parabroncholes. Oxygen gas passes from these capillaries to the blood capillaries, thus causing gas exchange.

In the lower portion of the bird's trachea, before branching the bronchi, we can find the syringe, a bag-like structure that has vocal cords responsible for the birds' scream and song. Most of the time, the sound emitted by birds serves to attract the mate, mark territory and prevent birds of the same species against some predator or other danger.

8 0
3 years ago
What is the purpose of ethical guidelines for handling of experimental subjects
Gemiola [76]

The purpose of ethical guidelines for handling of experimental subjects is to ensure the safety and well-being of all living creatures in an experiment.

Ethical guidelines include issues such as human rights, animal welfare, safety compliance with the law, conflicts of interest,  health standards..

Ethical guidelines are the norms for the acceptable and unacceptable behaviors of the researchers.


4 0
3 years ago
Read 2 more answers
Energy is measured in
andre [41]

Answer:

It is measured in Joule

Explanation:

Energy Units and Conversions. 1 Joule (J) is the MKS unit of energy, equal to the force of one Newton acting through one meter. 1 Watt is the power from a current of 1 Ampere flowing through 1 Volt. 1 kilowatt-hour is the energy of one kilowatt power flowing for one hour.

I hope this helps! Please mark me brainliest!

7 0
3 years ago
A scientific theory is best defined as
MrMuchimi

Answer:

A scientific theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment. Such fact-supported theories are not "guesses" but reliable accounts of the real world.

Explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • If given the exact same amount of ATP, which of the three fiber types would be able to contract for the longest amount of time?
    14·1 answer
  • What are some earth like planets that scientists are discovering?
    9·2 answers
  • How are foods that are carbohydrates related to sugar?
    9·1 answer
  • Residents of three villages with three different types of water supply were asked to participate in a study to identify individu
    12·1 answer
  • Males of some species have proteins in their ejaculate that cause the female to be less attractive to other males for some perio
    8·1 answer
  • What would happen if prey were added to the food web?
    11·2 answers
  • How do the offspring genetically compare to the parents?
    5·1 answer
  • What is another name for reservoirs
    8·1 answer
  • What is a bad consequence of extensive use of fertilizer? *
    8·1 answer
  • Please someone answer..
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!