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Alexandra [31]
3 years ago
9

Which of the following is not one of the nitrogen bases that form the rungs of the ladder in DNA? a. adenine 2. cytosine 3. fran

cine, 4. guanine
Biology
2 answers:
Amiraneli [1.4K]3 years ago
6 0

Answer:

3 francine

Explanation:

The four nitrogenous bases that compose DNA nucleotides are shown in bright colors: adenine (A, green), thymine (T, red), cytosine (C, orange), and guanine (G, blue). francine is not one of them

Marrrta [24]3 years ago
4 0

Answer:

3. francine

Explanation:

thymine (T), adenine (A), cytosine (C), and guanine (G) thymine are the rungs of the DNA ladder.

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Which chromosomal defect is caused when part of a chromosome breaks off and reattaches backward on the same chromosome?
LiRa [457]

The right answer is inversion.

Inversion is a genetic mutation characterized by the end-to-end reversal of a portion of chromatid on a chromosome.

In other words, it is a double break then it is replaced after rotation of 180 ° of a chromosome segment (backward insertion).

We distinguish :

Paracentric inversions:  The centromere in the chromosome is not included in the inversion.

Pericentric inversions:  The centromere is included in the inversion which transforms a metacentric chromosome into an acrocentric chromosome.

8 0
3 years ago
Read 2 more answers
8(b)(i). Diagram 8.2 shows part of the Periodic Table. State the type of<br>element for P. *<br>​
chubhunter [2.5K]

Answer:

<u><em>Phosphorus</em></u>

Phosphorus is a chemical element with the symbol P and atomic number 15. Elemental phosphorus exists in two major forms, white phosphorus and red phosphorus, but because it is highly reactive, phosphorus is never found as a free element on Earth.

Explanation:

Brainliest?

6 0
3 years ago
Select the correct answer.
mafiozo [28]

Answer:

A

Explanation:

I believe the answer is A because conservation tillage reduces erosion & runoff but I'm not 100% sure.

5 0
3 years ago
In horses, Chesnut hair color is recessive to black. The pacing gait is recessive to trotting and long hair is recessive to shor
Vitek1552 [10]

9:3: 3:1  is the phenotypic ratio showing traits as black and long hair : black and short hair: chestnut and long hair: chestnut and short hair when a chestnut horse heterozygous for pacing and hair length with a hybrid horse.

Explanation:

Dominant trait = black hair colour (BB,Bb), trotting (TT,Tt) , long hair (LL,Ll)

recessive trait = chesnut hair colour (bb), pacing gait (tt), short hair(ll)

cross between chestnut horse heterozygous for pacing and hair length will have alleles as BbLl

alleles for hybrid horse will also be heterozygous Bb, Ll

Punnett square to show the cross:

      BL         Bl       bL         bl

BL  BBLL  BBLl     BbLL    BbLl

Bl   BBLl    BBll     BbLl      Bbll

bL  BbLL  BbLl      bbLL     bbLl

bl    BbLl  Bbll       bblL        bbll

phenotype ratio

black and long hair : black and short hair: chestnut and long hair: chestnut and short hair

9:3: 3:1  is the phenotype ratio.

3 0
4 years ago
Asexually reproducing organisms produce offspring that are genetically identical to each other and to the parents. What type of
Bad White [126]

Respuesta:

Es  mitotic

Explanation:

Pues la mitosis es un proceso de división celular ligado a la reproducción asexual, en la que únicamente es necesario un individuo para generar descendecia.

8 0
3 years ago
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