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In-s [12.5K]
3 years ago
10

in a dna molecule, the complementary strands are joined at the nucleotides by hydrogen bonds between the

Biology
1 answer:
avanturin [10]3 years ago
3 0

Answer:

covalent bonds within each strand

Explanation:

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Please help will give brainist! (multiple choice question , one answer.)
yanalaym [24]

Answer:

D i belive, if i'm worng, please don't be mean about it

Explanation:

5 0
2 years ago
which characteristic can be inherited? A. long toes. B. short temper. C. sense of humor. D. acting ability.​
iogann1982 [59]

A. long toes

because temper, humor and acting ability cannot be inherited.

5 0
2 years ago
Read 2 more answers
Beginning with a cell that just fertilized ( 1 cell ) how many times must it divide to become a 64 cell blastomere ?
natka813 [3]

A cell that just fertilized has to divide 6 times to form a 64 cell blastomere.

<u>Explanation:</u>

Human reproduction begins with the fusion of male gamete sperm and female gamete ovum. The fusion of sperm and ovum forms the zygote that is diploid. The zygote then undergoes mitotic division to develop into embryo.  

The zygote first divides into two and the two individual cells divide again to form four individual cells and so on. Thus the number of cells after each division can be represented by the equation 2^n  where n is the number of divisions.  in the question it is given that the blastomere has 64 cells.

2^n=64  

n=6

This means that the fertilized cell has to divide 6 times to develop into 64-celled blastomere.

7 0
3 years ago
If a friend tosses a leftover apple in a field is it apple pollution or not? Please answer ASAP.
GrogVix [38]

Answer:

it is biodegradable but the apple core does not have the same, the core is equally as dangerous as any other type of litter because it will help a hungry animal find a meal.. if that makes sense

4 0
3 years ago
A woman and a man are both heterozygous for a recessive allele for a rare genetic disease. If they have one child, what is the p
makkiz [27]

Answer:

  • If they have one child, the probability that he or she will be affected is 1/4.
  • If they have two children, the probability that at least one of them will be affected is 7/16.

Explanation:

A cross between two heterozygous Aa individuals will produce the followinf offspring: 1/4 AA, 2/4 Aa and 1/4 aa.

Since the disease is recessive, 1/4 of the offspring will have the <em>aa </em>genotype and 3/4 of the offspring will be unaffected.

Every time they have children new gametes were generated <u>independently</u>.

The probability of having <u>no</u> affected children both times is, according to rules of probability for independent events, 3/4 × 3/4 = 9/16 (it's the probability of having a healthy child the first time multiplied by the probability of having a healthy child the second time).

The probability of having at least one affected child is 1 - probability of no affected children = 1 - 9/16 = 7/16.

8 0
3 years ago
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