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e-lub [12.9K]
3 years ago
15

What is meant by the term epistasis? Distinguish between epistasis and dominance. Do not use examples in answering this question

.
Biology
1 answer:
Sunny_sXe [5.5K]3 years ago
7 0

Answer:

Epistasis is a phenomenon in Genetics in which mutations on one gene locus are dependent on the mutations on some other genes locus. In other words, the expression of a phenotype of one gene is dependent on the presence or absence of mutations on other gene.

Dominance is phenomenon in genes in which a particular genotype masks the expression of alternative genotype and expresses itself due to complete takeover over other.

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Aquaporins are proteins that control the passage of water molecules across a cell membrane. The protein forms a pore, or opening
timofeeve [1]

The two different molecules of aquaporin will have different sequences of amino acids

Explanation:

Aquaporins are an integral type of membrane proteins. They act as water channels and their function is to transport water and other solute materials across cells membranes and thereby control and regulate the water content of the cells.

They are formed by clustering of four water channel monomers forming a tetramer.

Each aquaporin is made up of a specific linear sequence of amino acids and variations in the sequence leads to formation of different aquaporins.

There are more than 10 types of aquaporins are known. The sizes of the aquaporins differ according to their pore diameter of each type and this difference leads to the selective permeability of water across cell membranes.

4 0
3 years ago
Identify the 2 major groups of enzymes that make the redox reactions possible: Describe their role in these reactions.
adell [148]

Answer:Enzymes that makes redox reactions possible in a biochemical process includes those that help to catalyze the transfer of electrons, atoms, or functional groups.

Explanation:

Here are some class categories of these enzymes and their roles ;

• Oxidoreductases - Transfer of electrons (hydride ions or H atoms)

• Transferases - Group- transfer reactions

• Hydrolases - Hydrolysis reactions (transfer of functional groups to water)

• Lyases - Addition of groups to double bonds, or formation of double bonds by removal of groups Transfer of groups within molecules to yield isomeric forms

• Isomerases - Formation of C-C, C-S, C--0, and C-N bonds by condensation reactions coupled to ATP cleavage

The above are however classified, given code numbers, and assigned names according to the type of transfer reaction, the group donor, and the group acceptor.

7 0
3 years ago
In hemoglobin, the transition from t state to r state (low to high affinity) is triggered by:_________
Elena L [17]

In hemoglobin, the transition from t state to r state (low to high affinity) is triggered by Bisphosphoglycerate (BPG)

  • Bisphosphoglycerate (BPG), also known as 2,3-Disphosphoglycerate (2,3-DPG), aids in the transition of hemoglobin from a high-oxygen-affinity to a low-oxygen-affinity state.
  • 2,3-BPG binds to hemoglobin, causing oxygen to be unloaded. Furthermore, 2,3-BPG reduces hemoglobin's affinity for oxygen. As hemoglobin is unloaded in our tissues, 2,3-BPG binds to it, promoting oxygen unloading.
  • When we increase the concentration of 2,3-BPG in our blood, the oxygen binding curve shifts to the right. This means hemoglobin will have a lower affinity for oxygen and will be able to deliver more oxygen to our body's tissues and cells.

Learn more about  Bisphosphoglycerate (BPG) from here:brainly.com/question/8885734

#SPJ4

4 0
2 years ago
How do seabirds get caught in fishing nets?
Sedaia [141]

Answer:

c. birds are baited by the metal hook...

Explanation:

5 0
3 years ago
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What is the intal source of energy on which plants rely to power photosynthesis?
Vikentia [17]
The initial source of energy is sunlight
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