Polygenic traits are those traits that are controlled by more than one gene. Such traits may even be controlled by genes located on entirely different chromosomes. Human height, eye and hair color are examples of polygenic traits. Skin color is another polygenic trait for humans and a variety of other animals
Answer:
Option 4
Explanation:
Folate is vitamin B and occurs naturally in various food items such as green leafy vegetable, lentils, peas, beans, in fruits such as banana, melon, and enriched products such as bread, juices etc. Folate is essential for making up genetic material or DNA. Out of all given options, option 4 has both lentil and spinach (green leaves) which are rich source of folate. Option 1 has bread as a source of folate. Hence, the correct answer is option 4.
Answer:
I think itś D
Sorry I don't take this course, but I try to help everyone
The correct order is:
2. Hydrogen bonds between base pairs of antiparallel strands are broken
Enzymes called helicases are responsible for this process because their role is to separate two DNA strands so they can be replicated.
1. Single-stranded binding proteins attach to DNA strands.
After two strands are separated into a Y shape-replication fork single strands are free for the replication machinery. Single strands are the templates for replication to begin.
3. Primase binds to the site of origin.
Primase is an enzyme which functions as RNA polymerase and thus catalyzes the synthesis of a short RNA segment-RNA primer.
5. An RNA primer is created.
Primer RNA is short RNA sequence that initiates DNA synthesis because DNA polymerase is disable to initiate polynucleotide synthesis by itself.
4. DNA polymerase binds to the template strand.
DNA polymerase binds to the strand at the site of the primer. The function of this enzyme is to add new nucleotides complementary to other strand.
Operons are gene regulatory mechanisms that involve promoting and repressing genes that are involved in the metabolism of organic substances (i.e. sugars). Living organisms have the innate ability to metabolize glucose as the main source of energy. Although, in the absence of glucose, the organism must "learn" to use sugars other than glucose (such as lactose) in order to survive.
For instance, in the <em>lac </em>operon:
In the absence of glucose, various regulatory proteins promote the transcription of the gene related to the metabolism of lactose. This will ultimately lead to the production of the enzyme beta lactosidase which will enable the organism to use lactose as energy in the absence of glucose. This will therefore increase the chances of the organism for survival and will be naturally selected for evolution.
