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The presence of three copies of a particular chromosome is known as trisomy. This genetic condition can lead to developmental abnormalities, such as Down syndrome which is caused by trisomy of chromosome 21.
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What is it called when an individual has three copies of a chromosome?
Having three copies of a chromosome is known as trisomy. This genetic condition can lead to developmental abnormalities and is commonly seen in disorders such as Down syndrome (trisomy 21).
A segment of chromosome responsible for a particular characteristic?
DNA or genens these are the segments of the chromosome.
The human gene associated with color vision are located on the what chromosome?
The human genes associated with color vision are located on the X chromosome. Specifically, the genes for three types of color receptors (cones) - blue, green, and red - are located on the X chromosome. This is why color blindness, which is more common in men, is often linked to mutations in these genes due to their presence on the X chromosome.
What are the major chromosomal changes in trisomy?
Trisomy is defined as the presence of three homologous chromosomes. For example, Down's Syndrome is caused by trisomy-21, 3 copies of chromosome 21.
Which chromosome determines a human s sex?
The sex of a human is determined by the presence of two sex chromosomes. Typically, males have one X and one Y chromosome (XY), while females have two X chromosomes (XX). The presence of the Y chromosome determines male development.
What common condition is caused by presence of three copied of chromosome 21?
Down syndrome
What is trisomy syndrome?
In a trisomy syndrome, an extra chromosome is present so that the individual has three of a particular chromosome instead of the normal pair.
What is it called when an individual has three copies of a chromosome?
Having three copies of a chromosome is known as trisomy. This genetic condition can lead to developmental abnormalities and is commonly seen in disorders such as Down syndrome (trisomy 21).
What is it called when a segment of a chromosome is repeated?
It is called a gene duplication event. This can lead to the presence of extra copies of a particular gene or genes, which can have various effects on an organism's traits and evolution.
What does the karyotype of a person with down syndrome show?
A genetic disorder caused by the presence of all or part of a third copy of chromosome 21.
What determines the sex of an individual?
Presence or absence of the Y chromosome
Type of mutation that causes Trisomy 18?
Trisomy 18 is caused by a type of mutation called nondisjunction, where an error in cell division results in an extra copy of chromosome 18. This leads to the presence of three copies of chromosome 18 in each cell instead of the normal two copies.
A segment of chromosome responsible for a particular characteristic?
DNA or genens these are the segments of the chromosome.
Explain the difference between trisomy and triploidy describe a way that each condition could occur?
Trisomy is the presence of an additional chromosome, such as having three copies of a particular chromosome instead of the usual two. This can occur during cell division errors, leading to an extra chromosome being introduced. Triploidy, on the other hand, is having three complete sets of chromosomes instead of the usual two. This can occur when an egg is fertilized by two sperm or due to errors in cell division during early embryo development.
How are the three chromosomal aberrations different from each other how are they similar?
The three chromosomal aberrations - deletion, duplication, and inversion - are different in terms of the changes they cause in the chromosome structure. Deletion involves the loss of a segment of the chromosome, duplication results in the presence of extra copies of a segment, and inversion entails the reversal of a segment within the chromosome. These aberrations are similar in that they can all lead to genetic disorders or abnormalities due to the changes in the chromosome structure they cause.
What type of mutation causes Edwards' syndrome?
An extra copy of Chromosome 18
The human gene associated with color vision are located on the what chromosome?
The human genes associated with color vision are located on the X chromosome. Specifically, the genes for three types of color receptors (cones) - blue, green, and red - are located on the X chromosome. This is why color blindness, which is more common in men, is often linked to mutations in these genes due to their presence on the X chromosome.
