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vichka [17]
3 years ago
15

Gene therapy is an integral part of genome projects. It includes the correction of abnormal genes responsible for diseases. Whic

h of these is an application of gene therapy? A) The removal of cells with abnormal genes from the body by surgical methods. B) Designing drugs to inhibit the function of a protein coded by an abnormal gene. C) The replacement of full chromosomes. D) The inhibition of all the genes associated with the abnormal gene to regulate their actions.
Biology
1 answer:
Marrrta [24]3 years ago
4 0
I'm pretty sure the answer is B have a nice day
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Record the stages of meiosis in eukaryotic cells realizing that there are two cell divisions involved, each having their particu
Leya [2.2K]
1.1
Meiosis I
The first meiotic division: diploid → haploid
    Prophase I: Chromosomes condense, nuclear membrane dissolves, homologous chromosomes join and occurs crossing over.
    Metaphase-I: the homologous chromosomes align in the middle of the cell. Spindle fibers from the centrosomes connect to the chromosomes.
    Anaphase -I: Spindle fibers contract and split the homologous chromosomes, moving them to opposite poles of the cell.
    Telophase -I: Chromosomes decondense; cell divides to form two haploid cells.

1.2 Meiosis II
The second division: separates sister chromatids (these chromatids may not be identical due to crossing over in prophase I)

     Prophase II: Chromosomes condense, nuclear membrane dissolves, centrosomes move to opposite poles (perpendicular to before)
    Metaphase-II:  the chromosomes align in the middle of the cell. Spindle fibers from the centrosomes connect to the chromosomes (at the centromere)
    Anaphase-II: Spindle fibers contract and split the sister chromatids, and moves them to opposite poles of the cell.
    Telophase-II: Chromosomes decondense,cells divides again to form another 2 haploid daughter cells. Final: 4 new cells.


2. The differences:
Mitosis:
- has 1 division per cycle
- one cell produces 2 new cells
- the genetic information in the mother-cell and the daughter-cells are the same. ( the number of chromosomes is also the same)
- it occurs in somatic cells
Meiosis:
- two divisions per cycle
- one cell when divides produces 4 new cells
- the new cells have different genetic information. mixes the genetic material from the parent cells
- the number of chromosomes of the daughter cells is half of the mother's.

3. Prokaryotic organisms don't divide through mitosis, they use a different process called binary fission. Only eukaryotic organisms, or those whose cells have a defined nuclei, undergo mitosis. Bacteria, for example, are prokaryotic organisms that use binary fission.

4.
 It can't occur. Cross over is the exchange of DNA between homologous chromosomes.  That will result in recombinant chromosomes during sexual reproduction. It can't occur on different chromosomes because they don't code for the same genes.

5. There are a lot of different theories about that, but it's mostly believed that meiosis must evolve before sexual reproduction. That's because The cell replicates their information first and then divides. Plus the cell does that even though it didn't recombine DNA with another organism (sexual reproduction).

3 0
3 years ago
The water cycle is driven by energy from the sun which process and the water cycle is caused directly by the Suns energy ?
amm1812
The answer is (A) evaporation, because when water gets hot it turns into a gas and rises into the air.
7 0
3 years ago
All transport through the cell membrane is classified as __________
xeze [42]

passive transport would be the answer to your question

8 0
3 years ago
Read 2 more answers
The study of the relative power and limits of genetic and environmental influences on behavior is known as
dmitriy555 [2]

Answer:

Behavior genetics.

Explanation:

Genetics may be defined as a branch of biology that studies the inheritance and variation of the inherited characters. Mendel is known as the father of the genetics.

Behavior genetics may be defined as the field of the scientific research that uses the genetic methods to investigate the behavioral differences in the individual. This genetics uses the limits of genetics and environmental impact on the individual's behavior.

Thus, the answer is behavior genetics.

6 0
3 years ago
Write a prediction about where in plant cells food is made and where it is converted into energy
ruslelena [56]

Answer:

plant cells food is made in the chloroplasts where the energy from the sun is converted into glucose

8 0
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