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faltersainse [42]
3 years ago
10

How do you tell if a dog is pregnant?

Biology
2 answers:
nasty-shy [4]3 years ago
5 0
During the first 2-3 weeks you will not see any physical signs. Look at your dog's nipples, for if it is pink, that may be an indication. Be sure to observe your dog's body and it's weight.
Ipatiy [6.2K]3 years ago
3 0
<span>Your dog can have a blood test at around 28 to 30 days gestation. Your vet will try to determine pregnancy by checking for a hormone called relaxin. However, if your dog is pregnant with a small litter (one or two puppies), the blood test may result in a false negative </span>
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If a molecule of DNA has 30% Adenine how much of the other bases will be present?
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Answer:

If a DNA molecule has 30% Adenine the percentage of the other bases is Thymine: 30% Cytosine: 20% Guanine: 20%.

Explanation:

When the percentage that a base has in a DNA molecule is given, the percentage of the other bases can be known using the Chargaff's base pair rule.

A DNA molecule has the information of the genome of a living being, according to a specific sequence of its nitrogenous bases adenine, guanine, cytosine and thymine.

Chargaff was able to establish that in a DNA molecule the ratio of purine : pyrimidine of 1:1, so there must be the same amount of thymine as adenine and a similar amount of guanine for the cytosine, taking into account the complementarity of bases.

Taking into account the law of the base pair, if in a DNA chain there is 30% of Adenine, in the molecule there is:

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  • <em>Total ..... 100% </em>

In this case, the <u>Chargaff rule is useful to determine the percentage of nitrogenous bases that exist in a DNA molecule, knowing the percentage of a single base</u>.

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