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IrinaVladis [17]
3 years ago
7

Which of the following breaks down the Ozone Layer when combined with cold and light?

Biology
1 answer:
kvasek [131]3 years ago
5 0

Answer:

CFC ( chlorofluorocarbon)

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Which of these changes in today's world is a product of advances in biology?
Rom4ik [11]
<span>increased crop yields Because i looked it up lol
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6 0
3 years ago
In a diploid species of plant, the genes for plant height and fruit shape are syntenic and separated by 18 m.u. Allele D produce
FinnZ [79.3K]

Answer:

C)Parental: 41% Dr, 41% dR; recombinant: 9% DR, 9% dr.

Explanation:

The notation Dr/dR for genotypes means that one homologous chromosome has the alleles Dr and the other homologous chromosome has the alleles dR.

The heterozygous plant  Dr/dR will produce 4 types of gametes: two identical to the chromosmes the individual has in its somatic cells (called parental), and two gametes which will be a mix of the alleles in the homologous chromosomes (called recombinant).

  • Dr: parental
  • dR: parental
  • DR: recombinant
  • dr: recombinant

To calculate the frequency of each type of gamete, we must use the formula:

Distance (map units) / 100 = frequency of recombination.

18 mu / 100 = 0.18.

The total frequency of recombination between the genes D and R is 0.18, but every time crossing over happens, two recombinant gametes are generated. Therefore, each recombinant gamete will have a frequency of 0.18/2=0.09 = 9%.

The frequency of parental gametes will be:

1 - frequency of recombinant gametes

1 - 0.18 = 0.82

But there are 2 parental gametes, so each of them will have a frequency of 0.82/2=0.41 = 41%.

6 0
3 years ago
Which staternent is one of the three parts of cell theory
DerKrebs [107]

Answer:

The Cell Theory:

Explanation:

1.cells are the basic human of structure and function of all living things

2. cells are the smallest part of a living that that is alive a keeps the organism alive  

3. all cells from from other cells

4. cells are damaged or destroyed, so they need replacing

hope this helps

5 0
3 years ago
Trilobites are used as index fossils because
vovikov84 [41]

Answer:

d

Explanation:

8 0
3 years ago
The fact that each plant gets only one allele from each parent plant is detailed in the law of
vlabodo [156]

Answer:

Segregation

Explanation:

The fact that each plant gets only one allele from each parent plant is detailed in the law of law of segregation. Mendel found that each pair of alleles segregates independently of the other pairs of alleles during gamete formation. When sperm and egg unite at fertilization, each contributes its allele, restoring the paired condition in the offspring. The allele pairs separate or segregate during gamete formation, and randomly unite at fertilization.

8 0
3 years ago
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