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
DochEvi [55]
3 years ago
8

Which correctly describes crossing over

Biology
2 answers:
ICE Princess25 [194]3 years ago
9 0

-Crossing over occurs between prophase 1 and metaphase 1 and is the process where homologous chromosomes pair up with each other and exchange different segments of their genetic material to form recombinant chromosomes. It can also happen during mitotic division, which may result in loss of heterozygosity.

natima [27]3 years ago
8 0

Hello. This question is incomplete. The full question is:

"Which correctly describes crossing over?  A)the process whereby nonsister chromatids exchange genetic material  B)the process whereby homologous chromosomes are pulled to opposite poles of the cell  C)the process whereby sister chromatids are pulled to opposite poles of the cell  D)the process whereby homologous chromosome pairs align randomly along the metaphase plate"

Answer:

A)the process whereby nonsister chromatids exchange genetic material

Explanation:

Crossing over is a phenomenon that involves homologous chromatids. They break at some points and, in the sequence, there is an exchange of corresponding pieces between them. It is worth noting that the exchanges cause the emergence of other gene sequences along the chromosomes. Thus, if there are several genes combined on a chromosome, after crossing the combination can be changed.

This process occurs during prophase I of meiosis cell division. Because of this characteristic, crossing increases genetic variability.

You might be interested in
A cell is in a solution with the simple sugar glucose. The concentration of glucose outside the cell is 30%, and the concentrati
yKpoI14uk [10]

The cell is in a hypertonic solution. Because there are more solutes outside the cell, the water will flow outside the cell in order to restore equilibrium.

4 0
3 years ago
Read 2 more answers
If interbreeding within the hybrid zone of the mountain pass decreased over time, what would you expect to happen to the Western
tamaranim1 [39]

Answer:

The two population will become separate species due to allopatric speciation

Explanation:

Allopatric speciation is also known as geographic speciation. In this speciation two populations of the same species isolated geographically from each other which prevents gene flow between them and the two populations evolve separately and over time, it leads to the creation of a separate species.

So here as interbreeding within the hybrid zone of the mountain pass decreased over time so it will lead to speciation in these populations and they will evolve into two separate populations due to lack of gene flow as a result of geographical isolation.

4 0
4 years ago
Using terms and concepts that you have learned in this course, examine 10 aspects of your own diet, and explain any changes you
olga_2 [115]

Answer:

Increase awareness of what I eat

Explanation:

  1. Eat more offal because it has CoQ 10. This is a powerful antioxidant and it will increase my energy and boost my immune system.
  2. Drink more green tea since it has theanine which is and amino-acid that will cross the blood brain barrier. This will increase my alertness and give me a sense of well-being.
  3. Eat more berries it has a wide range of differing antioxidants. It's important for scavenging reactive oxygen species in the body that could damage the cells.
  4. Drink more water flush toxins out. This will also keep me hydrated and keep the blood body levels normal.
  5. Eat more green leafy vegetables because it has iron, important for making haemoglobin.
  6. Eat more nuts it has magnesium and potassium which are important for over 300 enzymatic reactions in the body and also critical for mood, alertness, sleep and pain management.
  7. Eat more fish it has iodine which is a trace component but will support thyroid health and improve immunity.
  8. Switch to pink salt get trace minerals that are not always available in iodized salts. These are important for the conduction of electrical impulses in the brain and increase reaction response and shorten reaction time.
  9. Eat two hours before bed to reduce indigestion, this will also decrease weight gain as the food is moved along the digestive system long before it is time to go to sleep.
  10. Cut out refined carbohydrates to reduce empty calories and incorporate whole grain and natural sweeteners, if any. This provides a more nutrient dense diet and also provide plenty of fiber to aid digestion and bowel movements. It also provide food for the good gut bacteria that helps to improve our immune system.
4 0
3 years ago
Vitamin d _____.
svetlana [45]
Vitamin D plays a vital role in the regulation of calcium deposits and maintenance of the phosphorous levels in the blood which are two elements that are significantly important for maintaining healthy bones.

The human body needs vitamin D to absorb calcium in the intestines and to recover calcium that would otherwise be excreted through the kidneys. It also essential for the development and strengthening of bones and it blocks the release of parathyroid hormones.

The answer would be letter E. None of the above
5 0
3 years ago
What happens to the food in small intestine?​
Elena L [17]

Answer:

the nutrients in the food is absorbed

4 0
3 years ago
Other questions:
  • Ideally, sustainable development should a. put the protection of the environment ahead of human needs. b. provide for human need
    10·1 answer
  • What level of organization does the complete skeleton of a mouse belong to
    9·2 answers
  • You transform an E. coli bacterium with the pGLO plasmid. After growing the +pGLO bacteria on an LB+Ampicillin+Arabinose plate,
    15·1 answer
  • Which factor most directly affects the wind speed between two locations?
    8·1 answer
  • In both plants and animals food molecules are broken down and CO2 is released by what
    10·1 answer
  • The photograph shows a community. What kind of community is most likely shown?
    13·1 answer
  • Which of the following is NOT a source of renewable energy?
    10·1 answer
  • 4a. By 40-60 years after farm fields had been abandoned, the amount of herbaceous plants
    13·1 answer
  • Am I right? Please someone help me
    14·1 answer
  • How many membrane layers cover the nucleus?<br> O A. 0<br> B. 3<br> C. 2<br> O D. 1
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!