1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
svetlana [45]
3 years ago
12

What is a point mutation? And what are the two consequences?

Biology
1 answer:
Mrac [35]3 years ago
4 0

<u>Answer:</u>

A point mutation is a mutation that takes place at a particular point in which one base pair in the DNA sequence is altered. During DNA replication is when point mutation usually happens. It causes change in chemical structure of gene or chromosome.

The two consequences can either be either a beneficial or a harmful (catastrophic) type of point mutation. In the gene the point mutation involves substitution, addition, deletion of a single nucleotide. The altered gene structure sometimes create a positive impact clearing the negative one unfortunately this point mutation that occurs brings fatal diseases.  

You might be interested in
The letters below represent a small section of one strand of a DNA molecule.
Ivanshal [37]

Answer:

C.

Explanation:

A with T

C with G

8 0
3 years ago
Fill in the following 1Green plant are called ___________since the synthesise their own food.​
baherus [9]

rose leaves licth leave

4 0
3 years ago
How can the random distribution of alleles result in a predictable ratio
jok3333 [9.3K]

Answer:

Let's recall Mendel's law of independent assortment that states, "During the formation of gametes, alleles of genes assort independently into each gamete"

How can the random distribution of alleles result in a predictable ratio?

For example, We have a trait for flower color either yellow or white, and the alleles for the flower color are Y and y. The yellow flower color is a dominant trait, and be expressed if plant has YY or Yy genotype. We cross a plant with genotype Yy with another plant Yy.

P1                                                   Yy   x  Yy

F1                                               YY : Yy: Yy: yy

Phenotype                        Yellow: yellow: yellow: white

Genotypic ratio                 1           :               2       :                 1

Phenotypic ratio                               3         :          1          

So, we see that phenotypic ratio is different from genotypic ratio. Although the distribution of alleles is random but still there are only four possible outcomes for a trait. Hence, we can predict the phenotypic and genotypic ratio of offspring by drawing a punnet square or gamete formation.

7 0
4 years ago
Which base does RNA have that DNA does not have?
Dmitrij [34]

Answer:

Uracil "U"

Explanation:

RNA shares Adenine (‘A’), Guanine (‘G’) and Cytosine (‘C’) with DNA, but contains Uracil (‘U’) rather than Thymine.

4 0
3 years ago
Hemangioblasts are specified by _________ in the ___________.
azamat

Answer:

d. FGF2 signaling, splanchnic mesoderm

Explanation:

Hemangioblasts are the cells that serve as common precursors for blood vessels and blood cells. The hemangioblasts develop from mesenchyme and can give rise to angioblasts (to serve as precursor cells for blood vessels) or pluripotent stem cells to serve as a precursor for blood cells.

The basic fibroblast growth factor (FGF2) is one of the three factors required for initiation of formation of blood vessels. The basic fibroblast growth factor (FGF2) is required for the development of hemangioblasts from the splanchnic mesoderm and their differentiation into angioblasts.

5 0
4 years ago
Other questions:
  • $569.65+12<br> 577.65<br> 540.65
    15·1 answer
  • Which of these organisms is a vertebrate?
    6·2 answers
  • Name 3 things that scientists use to give new organisms names
    10·1 answer
  • ¿Porque la biodiversidad es importante?
    5·1 answer
  • Which of the following best states the purpose of villi?
    12·1 answer
  • Identify the structure of the human heart which is a valve between the right atrium and the right ventricle of the heart that di
    9·1 answer
  • Write the sequence of the mRNA molecule synthesized from a DNA template strand having the sequence 5’-ATCGTACCGTTA-3’. (b) What
    10·2 answers
  • It’s biology someone help
    10·1 answer
  • The largest section of the circulatory system is the ______.
    15·2 answers
  • IN SCIENCE :d HELP PLEASE
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!