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natka813 [3]
3 years ago
6

Many of the phenotypes of DiGeorge syndrome have been traced back to one of the genes that is in the deleted region, TBX1. Some

of the evidence for the important role of TBX1 in DiGeorge syndrome came from individuals who have some of the symptoms of DiGeorge syndrome without having the typical deletion. Closer examination showed that some of these individuals had SNV in the TBX1 gene. Which of the following SNVS would be most likely to create a similar phenotype to the deletion?
A. A variant in the promoter region of TBX1 that increases its expression
B. A variant in the intronic region of TBX1 that does not affect splicing. X
C. A nonsense variant near the 5' end of the TBX1 gene.
D. A silent variant near the 5' end of the TBX1 gene.
Biology
1 answer:
ohaa [14]3 years ago
3 0

Answer:

D. A silent variant near the 5' end of the TBX1 gene.

Explanation:

TBX1 gene is wild type human being. It gives instructions for making protein called T-box 1. It plays an important role in tissue formation and organs during embryonic development.

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Which of the following is in the correct order from the smallest to the largest
SCORPION-xisa [38]

gene,chromosome,dna,nucleus, and cell

if you look it up you will get the following stated below

"nitrogenous base, nucleotide, codon, gene, chromosome, nucleus, and cell"\

an easy way to remember it will to be

the gene tells you what it would be you get one from mom and one from dad

you need genes to link and make chromosomes

chromosomes to link into strands of dna

there is dna in the nucleus and the nucleus in inside the cell.


hopefully this helps.


8 0
3 years ago
Based on his experiments, Mendel concluded that each trait was controlled by two _____.
USPshnik [31]
The correct answer is alleles.
While conducting experiments, Mental understood that each trait of the pea plants were controlled by two alleles and depending on those the plant would have different characteristics.

An allele is a variant form of a gene, so for example, in the gene that codes the color of the plant, the alleles could code for green or yellow.

4 0
3 years ago
Read 2 more answers
A specialized structure within a cell that has its own specific function is known as a/an _______.
vichka [17]

Answer:

Organnelle

Ribosomes

Nucleus

Archaeabacteria

Phospholipid bilayer

Lipases

Explanation:

1. Organnelles are specialized structures in a cell designed to perform a particular function that will make the cell normal e.g. ribosome, Chloroplast, mitochondrion are examples of organnelles.

2. The Rough Endoplasmic Reticulum (RER) is one of the two endomembranous systems in the cell. It is characterized by its rough appearance which occurs as a result of ribosomes attached to its surface. This attachment of ribosomes makes its function related to protein synthesis.

3. Nucleus is a membrane bound organnelle found only in EUKARYOTIC cells. It houses the genetic material (DNA) of a cell and acts as the brain by directing all of the cellular activity of that cell.

4. Archaeabacteria is one of the six kingdoms in the hierarchical classification of living organisms. They contain unicellular and prokaryotic organisms that are uniquely characterized by their ability to survive extreme conditions e.g high temperature.

5. The plasma membrane is an outer covering that bounds the cells of both Prokaryotic and eukaryotic organisms. According to the fluid mosaic model that describes the structure of the cell membrane, it contains a phospholipid layer that confines its selective permeability upon it i.e. ability to control what goes in and out of the cell. This is due to the amphipathic nature of the phospholipid i.e. contains an hydrophobic and hydrophilic region.

6. Lipases are enzymes that are involved specifically in the breakdown of lipids and fat molecules into fatty acids and glycerol.

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3 years ago
Which description explains why there are two high and two low tides in a day? (4 points)
SCORPION-xisa [38]

Answer:

Earth rotates in and out of a tidal bulge twice a day.

Earth always has two surrounding gravitational forces, one proceeding from the moon and one from the sun.

The sun's pull, despite the fact our sun is further then the moon, is stronger and creates the high tide, and the moon the low tide. But as we know our earth moves, now exposing the other side to the sun which in turn leaves the other side of earth with the high tides and the other with the low tides. Tides never move, what moves is earth.

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