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
Zina [86]
3 years ago
5

Epistasis often results in modified dihybrid phenotypic ratios. assume that you obtain one such modified ratio, 9:7, with the ge

ne pairs a and b involved. what would be a possible genotype for a phenotype that would be included with the 9 portion of the modified ratio?
Biology
2 answers:
Law Incorporation [45]3 years ago
6 0

Answer:

The answer is AaBB the genotype for 9 in ratio 9:7.

Explanation:

Epistasis is the interaction that occurs in genes that are located at different loci located on the same chromosome, with the consequence that one gene can mask or suppress the expression of another gene. This means that an epistatic gene appears (gene that manifests itself) and another called hypostatic (non-allelic gene that is inhibited). This type of interaction is the product of genes not alleles.

Andru [333]3 years ago
4 0

When two genes (A and B) are involved in a pathway, both are required to make functional products for expression. When there's a presence of recessive allele of either of the two genes, it results in the expression of a mutant phenotype. The normal ratio of a self-crossed dihybrid is 9:3:3:1, but due to epistatic interations of the A and B genes, the ratio gets modified to 9:7. The 9 portions in this ratio will correspond to the A_B_ genotype i.e., (AaBb, AABb, AaBB, AABB).

You might be interested in
​when stressed, the body's _____ response prepares it for quick action by pumping more blood to the legs and arms, tensing muscl
alexandr402 [8]
The correct answer is fight or flight.
The fight or flight response also called acute stress response, is a physiological response to a perceived attack, threat or in general any stressful event. This reaction consists the first stage of the general adaptation syndrome, which is the mechanism that regulates the response to stressful situations.

This response consists of an activation of the autonomic nervous system and a cascade of hormones, including catecholamines, cortisol, estrogen, testosterone, and dopamine. This hormonal cascade results in many physiological changes which prepare the body for action.
8 0
3 years ago
Triglycerides vary with respect to the number of ...
KIM [24]

Triglycerides vary with respect to the number of - C atoms and double bonds in the tails.

Triglycerides are esters derived from glycerol and three fatty acids. These are the main constituents of body fat in humans and other animals, as well as vegetable fat. There are two main types of triglycerides - saturated and unsaturated.

6 0
3 years ago
An unknown disease or a well-known disease that suddenly becomes harder to control is called
adell [148]
D. a viral disease because it is known and unknown and spreads.
8 0
3 years ago
List and describe the role of the 3 types of rna.
steposvetlana [31]

<span>There are three RNAs with a role in the synthesis of protein.</span>

mRNA, or messenger RNA, is the link between a gene and a protein. The main role of this ribonucleic acid is in transcription (”reading“) of DNA. The DNA is transcribed by RNA polymerase, and the resulting product of this process is mRNA. This form of RNA can be modified post-transcriptionally with methylguanosine caps and polyadenosine tails. RNA carries the genetic information which is copied from DNA and the information has a form of three-base code (“words”), codons. Each of these codons specifies a particular amino acid.

tRNA or transfer RNA is the molecule with the main function in translation by "decoding" the mRNA message during this process. Each type of amino acid has its own type of tRNA and also has a three-base sequence (anticodon) that can bind complementary with the codons in the mRNA.

rRNA or ribosomal RNA is a main component of ribosomes. rRNA associates with a set of proteins to form ribosomes which catalyze the assembly of amino acids into polypeptide chains (protein).

 

<span>There are also a few more types of RNA which have a regulatory function like, microRNA or siRNA.</span>

4 0
2 years ago
After clara learned that penguins are birds that cannot fly, she had to modify her existing concept of birds. this best illustra
OLEGan [10]
Answer:  "accommodation".
________________________________
8 0
2 years ago
Read 2 more answers
Other questions:
  • Hemophilia is caused by the recessive allele on the X chromosome. If a mom is a carrier for hemophilia and dad does not have hem
    12·2 answers
  • ________________ is the term that describes the displacement of an organ or tissue that protrudes through the wall or from the c
    11·2 answers
  • 6. the part of the circulatory system that brings carbon-dioxide filled blood to the lungs cell
    13·1 answer
  • On one show. Tyler learns that meerkats spend the late afternoon in their burrows. “They are so lazy!" he complains. James expla
    11·2 answers
  • Which occurs during digestion
    5·2 answers
  • Which forms of self-injury (si) are most common?
    7·2 answers
  • Which color has the shortest wavelength
    11·2 answers
  • What do coal deposits tell you about the continents?
    10·1 answer
  • Obsidians glassy texture indicates that it formed
    14·1 answer
  • Explain the concept of “survival of the fittest.”
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!