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
postnew [5]
3 years ago
12

Two true-breeding strains of corn with the genotypes CC and cc are crossed, where C = crunchy phenotype is dominant to c = soft

phenotype. The resulting F1 corn are crossed, and the ratio of crunchy to soft phenotypes in the F2 generation is 3:1. This is an example of:
A. non-disjunction.
B. a di-hybrid cross.
C. a mono-hybrid cross.
D. a test cross.
E. complementation.
Biology
1 answer:
salantis [7]3 years ago
4 0

Answer:

The correct answer will be option-C

Explanation:

A mono-hybrid cross is a cross which is performed to study the pattern of inheritance involving or studying a single trait at a time.

In the given case, the trait studied is the texture of corn seed with two versions that are crunchy and soft phenotypes. The crosses made between them showed 3:1 ratio of crunchy to soft phenotypes in F₂ generation.

Since 3:1 ratio in F₂ generation is obtained in the monohybrid cross therefore, Option-C is the correct answer.

You might be interested in
When Mr. T’s blood pressure dropped, his heart rate increased. Which part of his autonomic system was responsible for this respo
faltersainse [42]

Answer:

Medulla oblongata is responsible for autonomic regulation system.

Explanation:

Autonomic regulation is a controlling system that regulates different function of body such as heart rate,digestion,blood pressure,urination,respiratory rate,papillary response etc.

Hypothalamus is the main center of controlling this functions.

Autonomic dysfunction occur when autonomous nervous system damages,and the effect may be mild to life threatening.

Autonomic activity may leads to certain kind of side effects like-

  • Dizziness,fainting
  • exercise intolerance.
  • sweating abnormalities.
  • Diarrhea,constipation,difficulty in swallowing.
  • Urinary problems,incomplete emptying of the bladder.
  • Vision problems,blurry vision,vaginal dryness etc.

6 0
2 years ago
When enzymes are elongating (building) a newly synthesized dna strand in pcr, new nucleotides are being added to the ____ of the
Tamiku [17]
The correct answer is c. 3 ' hydroxyl of deoxyribose.  
<span>
During the DNA synthesis via PCR, polymerization occurs in 5’-3’ direction. This means that enzyme DNA polymerase which synthesizes a new DNA strand is complementary to the DNA template strand (3’-<span>5’ direction). 5’ phosphate group of the free nucleotides which are added is attached to the 3'-hydroxyl group at the end of the elongating DNA strand.</span></span>
3 0
3 years ago
Read 2 more answers
Which of the statements regarding the cell cycle is true? Group of answer choices It is regulated by cyclins and CDKs. Different
MA_775_DIABLO [31]

Answer:

All of these choices are correct.

Explanation:

Cell cycle is the process of growth and division of cell. It comprises of interphase and mitosis. In interphase the cell grows, replicates its genomic content and prepares itself for division. In mitosis the division occurs.

Cell cycle is controlled by a group of kinases called as Cyclin dependent Kinases (CDKs). They act by phosphorylating their substrates. They are of various types like Cdk1, Cdk2, Cdk4 etc. They become active when they bind to a regulatory protein called cyclin. They are also of various types like Cyclin A, Cyclin B, Cyclin C etc. Level of cyclin and corresponding CDK increases and decreases according to the stage of cell cycle. For example in S phase of cell cycle concentration of cyclin A and E shoots up. CDK2 is able to bind to these cyclin molecules and hence it becomes active.

Cell cycle has major checkpoints where the condition of cell is analysed before it proceeds to the next stage of cycle. If any abnormality is detected, repair mechanism is activated or the cell is killed. Checkpoints do not allow cell cycle to proceed in damaged cells.

p53 is a tumor suppressor protein which can halt cell cycle when it detects some abnormality in cell. It usually acts in G1/S checkpoint (before the DNA replication starts in cell) and G2/M checkpoint (before the cell division begins). Hence, all of the above statements are true.

7 0
3 years ago
When free energy is released during a chemical reaction it is called what of below
Nady [450]

Answer:

an exergonic reaction

6 0
2 years ago
Glycolysis is active when cellular energy levels are _____; the regulatory enzyme, phosphofructokinase, is _____ by atp.glycolys
vampirchik [111]
<span>Glycolysis is a process that can be seen as occurring in eukaryotic cells. This process is active when cellular energy levels are low; and the regulatory enzyme is inhibited by ATP. This process releases energy that is labeled as 'free'. After this process the released energy goes to form ATP molecules, which are high in energy.</span>
8 0
3 years ago
Other questions:
  • Why do water molecules stick to each other??
    14·2 answers
  • Do ypu think it id more efficient for people to eat plant products or animal producta
    8·1 answer
  • the Andes mountains are found along the western coast of south america . what kind of plate boundary's responsible for this moun
    9·2 answers
  • Describe at least two populations that share your biome
    11·1 answer
  • Why is nitrogen fixation such an important step in the nitrogen cycle?
    7·2 answers
  • A cell that contains 46 chromosomes arranged in 23 pairs undergoes the process of _____ to produce two new cells, each containin
    11·1 answer
  • Alleles A and a reside at a locus on the same chromosome as a locus with alleles B and b. Aa Bb is crossed with aa bb and the fo
    6·1 answer
  • Climate in a given region can be considered an average of that region's daily weather. true or false
    6·1 answer
  • How do living organisms interact with each other?
    5·2 answers
  • When the net force of opposite forces is zero, the forces are
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!