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Ksenya-84 [330]
3 years ago
10

QUESTION 20

Biology
1 answer:
sdas [7]3 years ago
7 0

Answer:

32

Explanation:

Meiosis always has half of the chromosomes as mitosis. Hope that this helps you and have a great day :)

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tamaranim1 [39]

Answer:

Tiny hairs, they filter the air coming in.

Explanation:

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3 years ago
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Why do the symptoms of certain viral infections occur after having disappeared for a period of time
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Viral infections affect your immune system, when attacking it, your body works very hard to fight against them and sometimes causes a change in homeostasis as you might increase your body temperature (fever) or you might get a headache (increased blood pressure). All this can happen after the virus is “killed” because your body is trying to regain homeostasis (a balance)
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4 years ago
Part A
quester [9]

Answer:

0.2 (or 20%)

Explanation:

The allele frequency can be calculated by counting how many times an allele appears in a population and then by dividing this number by the total number of alleles of the gene. In this case,

- Genotype BB = 30 moths >> 60 copies of the B allele

- Genotype Bb= 12 grey moths >> 12 copies of the B allele and 12 copies of the b allele

- Genotype bb= 3 white moths >> 6 copies of the b allele

The total number of copies of the gene is:

Dominant (B) allele = 60 (BB genotype) + 12 (Bb genotype) = 72 B alleles

Recessive (b) allele = 12 (Bb genotype) + 6 (bb genotype) = 18 B alleles

Then, 72 + 18 = 90 alleles  

Allele frequencies:

Dominant (B) allele = 72/90 =  0.8 (or 80 %)

Recessive (b) allele = 18/90 = 0.2 (or 20%)

3 0
3 years ago
What do plants take into their structures in order to photosynthesize. Name all things they take in.
guapka [62]
Sunlight,Carbon dioxide, water
5 0
3 years ago
Is it possible to find the same gene in two different kinds of organisms but not find the protein that is produced from that gen
Bingel [31]
Yes, quite frankly it is possible to find a same gene if you're in the same class of species, but finding the protein....I believe that's impossible because in every type of gene, you have the same proteins that make you function the same way. Without them you wouldn't be able to function properly.

If I found the same gene in all organisms that I've tested, I would be intrigued because that would be a giant step in evolution. My reason for this answer is because if you have the same gene that would technically mean we all specifically came from the same species of animals.

No, that's not true because other characteristics would eventually help us in many things, studies would help us get our brain much stronger and the intelligence level would be extraordinary.
6 0
3 years ago
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