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aksik [14]
4 years ago
8

How many atoms are in the elements beryllium

Biology
1 answer:
VLD [36.1K]4 years ago
8 0

the answer is four hope this helps :)


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Why was mercury added to products?
Pavel [41]
This question dose not have enough info to answer, i'll gladly help if this question had a date in which mercury was used or what had mercury in it.
I apologize.
6 0
3 years ago
C) This mutation is a recessive trait. What is the likelihood that a woman who does not possess the sickle cell trait and a man
maks197457 [2]

What is Sickle cell anemia?

Sickle cell is an autosomal recessive trait of humans that arises through mutation in normal gene. The gene for this trait is found in recessive form and you need two copies of the gene - one from father and one from mother- to have the trait expressed. If the trait is expressed it causes a disease called sickle cell anemia.

People with the sickle cell anemia disease have red blood cells of crescent or sickle shape. The red blood cells of this shape can cause many complications in body. They get stuck in blood vessels and cause pain. They also die quickly and make a person anemic (pale).

Probability to have a child with sickle cell anemia:

If a mother is normal but a father is carrier for the trait,  then the situation will be as:

Here N indicate normal allele, S indicate allele for sickle cell anemia.

                                    Mother           ˣ                            Father

                                      NN                                                 NS

Gametes:            N             N                                  N                S

Offspring:           NN             NS                             NN                     NS


                                                50% :                  Normal

                                                50% :                  Carrier

                                                0%    :                 Sickle cell anemia

It means that 50 % kids will be normal and 50% will be carrier for the trait and none of the offspring will have disease Sickle cell anemia. However, those who are carriers can carry the disease to the next offspring if they are married to a carrier or a person with sickle cell anemia.


6 0
3 years ago
What are two limitations of using a marble to model an atom
Oliga [24]
In the 50s the model of the atom looked like a planet, with the electrons circling the nucleus. Now we know the elections are shared by many nucleuses so that the model was actually very misleading.
5 0
3 years ago
If the body cells in an organism have no homologous pairs of chromosomes,
IceJOKER [234]

Answer:

C. Haploid

Explanation:

A haploid human cell is a gamete with 23 individual unpaired chromosomes.

8 0
3 years ago
Identify the following by typing (a) for mitosis or (b) for meiosis on the line before the statements: _____ produces 4 unique g
kenny6666 [7]

Answer:

b - produces 4 unique gametes

a - begins with a somatic cell

a - produces only 2 identical cells

a - has only one nuclear division

b - happens in the testes and ovaries

b - daughter cells are haploid

b - has two nuclear divisions

a - daughter cells are diploid

Explanation:

Mitosis is a kind of cell division that involves the formation of two daughter cells, which are genetically identical and have the same number of chromosomes as their parent cell (diploid). Mitosis occurs in body or somatic cells for repair and multiplication. Mitosis involves only one nuclear division.

Meiosis, on the contrary, involves formation of four daughter cells that are genetically different from the parent cell and have a reduced chromosomal number (by half). Meiosis occurs in reproductive cells like tested or ovaries. Meiosis occurs in two nuclear divisions.

8 0
3 years ago
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