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
Naddika [18.5K]
3 years ago
8

Crossing over occurs in prophase of meiosis I. Crossing over results in A. half the number of original chromosomes. B. double th

e number of original chromosomes. C. genetically identical homologous chromosomes. D. new combinations of genes.
Biology
2 answers:
dlinn [17]3 years ago
7 0

Answer:

New combinations of genes.

Explanation:

Crossing over may be defined as the process of the  exchange of the genetic material of the homologous chromosomes between non sister chromatids . The crossing over occurs in the prophase of the meiosis.

The some portion of genetic material exchanges randomly on the crossing over. This causes the generation of the new combination of genes in the organism. The linked chromosomes shows crossing over between them.

Thus, the correct answer is option (D).

klio [65]3 years ago
6 0

D. new combinations of genes.

You might be interested in
Why is air quality important for growing crops?
NemiM [27]

Less tilling thanks to genetically modified herbicide-tolerant crops also means that farmers spend less time on their tractors, using less fuel and reducing carbon emissions.  Conservation tillage enabled by genetically modified crops has reduced greenhouse gas emissions on farms globally and can help farmers adapt to and mitigate climate change.  In fact, in 2014 5.2 billion pounds of atmospheric carbon dioxide emissions were reduced by conservation tillage and decreased fuel use made possible by genetically modified crops.  That’s equal to removing nearly 10 million cars from roads for one year. 

According to the USDA, adopting conservation tillage can save at least 3.5 gallons of fuel per acre for farmers who would spend less time on their tractors, reducing emissions.  If all of the corn planted in the U.S. (non-genetically modified and genetically modified combined) in 2015 was grown with conservation tillage methods, nearly 308 million gallons of fuel would be saved, equivalent to preventing 6.9 billion pounds of carbon emissions. 

this is y air is important
3 0
3 years ago
What is the definition of mutation
NeX [460]
The definition of mutation is <span>the changing of the structure of a gene, resulting in a variant form that may be transmitted to subsequent generations, caused by the alteration of single base units in DNA, or the deletion, insertion, or rearrangement of larger sections of genes or chromosomes.</span>
5 0
3 years ago
Read 2 more answers
Genetic variety in organisms is created through
dlinn [17]
Genetic variety in organisms is created through C) Meiosis. mitosis is a stage of the cell cycle and asexual reproduction occurs between only one parent, so not much variety. Cell fission is a form of asexual reproduction in bacteria, archaea, and other unicellular organisms such as diatoms and protozoans.
3 0
3 years ago
in a glass you have 76% salt water also you have an egg which is 90% water inside, which way would the water move.
Lesechka [4]
Since osmosis is the movement of water molecules from a region of higher concentration to a region of lower concentration water molecules would move out of the egg into the salt solution in the glass in order to dilute it
4 0
3 years ago
Geneva was walking on the beach on a crisp November morning when a cool wind came her way. How would Geneva’s body respond to ma
Paha777 [63]

Answer:starts to shiver

Explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • How are lactic acid fermentation and alcoholic fermentation similar
    8·1 answer
  • A human skin cell, in prophase of mitosis, contains 46 chromosomes. how many chromatids does it contain in total?
    6·1 answer
  • What’s gene frequency in biology?
    15·1 answer
  • What are 3 pieces of evidence to support the theory of endosymbiosis?
    13·1 answer
  • The parents of a 2-year-old arrive at a hospital to visit their child. The childis in the playroom when the parents arrive. When
    6·1 answer
  • What statement is not apart of the cell theory
    7·2 answers
  • Use the data set to answer the question. Which best describes the data set
    12·1 answer
  • CFCs can act as greenhouse gases and as chemicals that reduce the ozone levels in the stratosphere. A worldwide ban on CFCs in 1
    9·1 answer
  • Explain the characteristics scientists use when observing organisms and placing them in the six kingdoms
    11·1 answer
  • What would be a consequence of a person having na levels in the blood and interstitial fluids that are well below normal?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!