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Mademuasel [1]
3 years ago
12

How many hydrogen bonds connect a cytosine to an guanine

Biology
1 answer:
Serjik [45]3 years ago
6 0

Answer:

3

Explanation:

Three hydrogen bonds....

"Cytosine and guanine pairing can be found in both DNA and DNA-RNA hybrid formed during replication and transcription. The two nitrogenous bases are held together by three hydrogen bonds."

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Blue flower color is produced in a species of morning glories when dominant alleles are present at two gene loci, A and B. Purpl
marin [14]

Answer:

The flower colour ratio obtained is:   Blue : Purple = 3 : 1.

Explanation:

  • According to the question,
  1. the genotype, AABB or AaBb or AABb or AaBB gives blue phenotype.
  2. the genotype, AAbb or aaBB or Aabb or aaBb gives purple phenotype.
  3. Red phenotype is for the aabb genotype.
  • As only the presence of dominant allele is mentioned but whether it is homozygous or heterozygous is not mentioned, in 1. we consider that presence of a single dominant allele A or B in either locus is capable of showing a blue phenotype, irrespective of the nature of the other allele.
  • In 2. we consider that the presence of a single dominant allele, A or B in one locus with recessive pairs of alleles in the other locus is sufficient to develop the purple phenotype.
  • The aaBb individual will produce the gametes: aB, ab.
  • The AABb individual will produce the gametes: AB, Ab.
  • Crossing them,

                                                      aB                ab

                                          AB     AaBB           AaBb

                                                    (Blue)          (Blue)

                                          Ab     AaBb           Aabb

                                                    (Blue)          (Purple)

  • Of the offspring obtained, 3 have blue phenotype and 1 has purple phenotype.
  • Hence, they have the following phenotypic ratio:

       Blue : Purple = 3 : 1.

8 0
3 years ago
If a hemophilia carrier female marries a Normal blood clotting male, what are the percentage of their children male and female p
vazorg [7]

Answer:

A man who has hemophilia and a woman who is a carrier have: a 25% (one in four) chance of having a son with hemophilia. a 25% chance of having a son with normal blood clotting. a 25% chance of having a daughter who is a carrier.

Explanation:

4 0
3 years ago
Growing up, Darwin saw that farm animals with preferred traits were choosen for breeding those chosen animals usually produced o
SpyIntel [72]
Selective breeding is the answer

7 0
3 years ago
Which of the following is a function of proteins? (AKS 1a)
lesya692 [45]

Answer:

ans is A long term energy

storage

5 0
4 years ago
Read 2 more answers
_____ mixing is a common method of producing color by varying the quantities of three inputsa. CPU b. RGB c. KGB d. OMG
valina [46]

Answer:

Option b

Explanation:

__RGB__ mixing is a common method of producing color by varying the quantities of three input.

For specialized applications such as LCD back lighting or projection images, and applications requiring dynamic color control, RGB mixing is the preferred choice.

Reference: Steigerwald, Daniel A., et al. "Illumination with solid state lighting technology." IEEE journal of selected topics in quantum electronics 8.2 (2002): 310-320.

7 0
3 years ago
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