A) Which has a chromatic body attached to the secondary constriction. Hint: SAT chromosome stands for
satellite chromosomes
. … The chromosome number 13, 14, 15, 21 and 22 are examples of satellite chromosomes.
What is SAT chromosome 11?
The chromosomes may have additional constriction or secondary constriction at their endsas distal part of the arm formed by chromatin thread are known
satellite chromosome
. These constriction gives appearance of an outgrowth or small fragment. These are also known as (sat) chromosomes or marker chromosome number.
What do you mean by SAT chromosome?
Satellite
or SAT chromosomes are chromosomes that contain secondary constructs that serve as identification. They are observed in Acrocentric chromosomes. In addition to the centromere, one or more secondary constrictions can be observed in some chromosomes at metaphase.
What is referred as satellite in few chromosome?
Some chromosomes may have
non-staining secondary constriction at certain location
. This appears like a small fragment and is called satellite.
How many sat chromosome are present in human?
The number of NORs in humans is 10. NOR occurs (13,14,15,21,
22
) in SAT (satellite chromosome) chromosomes. Hence, option D: 5 is the correct answer.
What is the full form of chromosome?
(KROH-muh-some) A structure found inside the nucleus of a cell. A chromosome is made up of proteins and DNA organized into genes. Each cell normally contains 23 pairs of chromosomes.
What is the tip of a chromosome called?
Telomeres
are repeating sequences of DNA found at the tips of human chromosomes. Telomeres are made up of base pairs, the matching sets of nucleotides that make up the rungs of the ladder in the DNA helix. Telomeres can be 15,000 base pairs long.
What is the full form of SAT?
About the SAT
In 1990, it was renamed the
Scholastic Assessment Test
. Soon, the College Board settled for the SAT as an empty acronym and changed the name of the test to SAT I: Reasoning Test. Finally, the Roman numeral was dropped. Now the test is known as the SAT Reasoning Test, popularly called the ‘SAT’.
What type of chromosome is Y chromosome?
| Human Y chromosome | Type Allosome | Centromere position Acrocentric (10.4 Mbp) | Complete gene lists | CCDS Gene list |
|---|
Why is it called satellite DNA?
The density of DNA is a function of its base and sequence, and
satellite DNA with its highly repetitive DNA has a reduced or a characteristic density compared to the rest of the genome
. Thus, the name ‘satellite DNA’ was coined.
What is a Lampbrush chromosome and where is it found?
Lampbrush chromosome are a special form of chromosome found
in the growing oocytes (immature eggs) of most animals
, except mammals. … Lampbrush chromosomes are clearly visible even in the light microscope, where they are seen to be organized into a series of chromomeres with large chromatin loops extended laterally.
What are types of chromosomes?
On the basis of the location of the centromere, chromosomes are classified into four types:
metacentric, submetacentric, acrocentric, and telocentric.
What are histones what are their functions?
Histones are a family of basic proteins that associate with DNA in the nucleus
and help condense it into chromatin
. … Histones are basic proteins, and their positive charges allow them to associate with DNA, which is negatively charged. Some histones function as spools for the thread-like DNA to wrap around.
What is Chromonemata in biology?
Definition of ‘chromonemata’
1.
the coiled mass of threads visible within a nucleus at the start of cell division
.
2
. a coiled chromatin thread within a single chromosome.
What is a Metacentric in biology?
A metacentric chromosome is
a chromosome whose centromere is centrally located
. As a result, the chromosomal arms (i.e. p and q arms) are almost equal in length. A metacentric chromosome would have the X shape. A chromosome with slightly unequal chromosomal arm length is referred to as submetacentric chromosome.
What chromosome is Isobrachial?
In metacentric chromosome centromere is
present in the middle
so, these chromosomes are isobrachial. In anaphase the chromosome appear V shaped.
