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Chromosomes
Chromosomes contain the genetic material DNA
1,309 Questions
Why does the y chromosome not carry any alleles?
The Y chromosome is smaller than the X chromosome and contains fewer genes. It carries the genes necessary for determining male sex and some other genes, but it lacks many of the genes present on the X chromosome. This is why the Y chromosome does not carry any alleles in the same way that the X chromosome does.
Where can you find an image of a chromosome?
You can find images of chromosomes in scientific research articles, biology textbooks, or on reputable scientific websites such as the National Institutes of Health (NIH) or the Wellcome Trust Sanger Institute websites. Additionally, many educational resources and databases like the Human Genome Project or the Online Mendelian Inheritance in Man (OMIM) also provide images of chromosomes.
Where do chromosomes come from?
Chromosomes are inherited from our parents. During sexual reproduction, one set of chromosomes is contributed by the mother through the egg cell, and another set is contributed by the father through the sperm cell. When the sperm fertilizes the egg, the resulting zygote carries a unique combination of chromosomes from both parents.
Why did the mutant chromosome got to the tailor?
There is no specific reason why a mutant chromosome would go to a tailor as chromosomes are found within cells and do not have agency or consciousness to make decisions. The concept of a mutant chromosome going to a tailor is purely fictional and not based on scientific understanding.
Chromosome pairs what and are distributed to sex cells?
Chromosome pairs undergo a process called meiosis during which they are divided. One of the pairs, known as the sex chromosomes, determines the sex of an individual. In humans, females have two X chromosomes, while males have one X and one Y chromosome. These sex chromosomes are distributed randomly to sex cells during meiosis, resulting in the formation of eggs (in females) and sperm (in males) with varying combinations of sex chromosomes.
How many chromosomes does a zorse have?
1000000
there are three different species of zebra.
Grevy's Zebra has 22226 chromosomes,
Plains Zebra has 44 chromosomes
Mountain Zebra has 333333 chromosomes
Do genes on a chromosome determine whether a baby is a boy or a girl?
yes particular one's do which are the xy chromasones
A Lobster's body cells do have a nucleus and organelles, hence they are classified as Eukaryotes. Lobsters themselves are properly described on the macroscopic not microscopic scale, and as such the Lobster organism itself doesn't possess a single nucleus; again, the term organelles refers to structures with a cell. On a macroscopic scale the lobster is said to possess organs.
There are 46 chromosomes in your body cells. The egg cells have half the amount of chromosomes as the body cells, so there are 23 chromosomes in the egg cells.
Autosomal recessive is one of several ways that a trait, disorder, or disease can be passed down through families.
An autosomal recessive disorder means two copies of an abnormal gene must be present in order for the disease or trait to develop.
Alternative NamesGenetics - autosomal recessive; Inheritance - autosomal recessive
InformationInheriting a specific disease, condition, or trait depends on the type of chromosome affected (autosomal or sex chromosome). It also depends on whether the trait is dominant or recessive.
A mutation in a gene on one of the first 22 nonsex chromosomes can lead to an autosomal disorder.
Genes come in pairs. Recessive inheritance means both genes in a pair must be defective to cause disease. People with only one defective gene in the pair are considered carriers. However, they can pass the abnormal gene to their children.
CHANCES OF INHERITING A TRAIT
If you are born to parents who both carry an autosomal recessive change (mutation), you have a 1 in 4 chance of getting the malfunctioning genes from both parents and developing the disease. You have a 50% (1 in 2) chance of inheriting one abnormal gene. This would make you a carrier.
In other words, if four children are born to a couple who both carry the gene (but do not have signs of disease), the statistical expectation is as follows:
- One child is born with two normal genes (normal)
- Two children are born with one normal and one abnormal gene (carriers, without disease)
- One child is born with two abnormal genes (at risk for the disease)
Note: This does not mean that children will necessarily be affected.
See also:
- Autosomal dominant
- Genetic counseling and prenatal diagnosis
- Heredity and disease
- Sex-linked dominant
- Sex-linked recessive
How the 2 sex chromosomes compare to each other in female fruit flies?
There is a 50% chance of having a male or a female each time sex chromosomes and inherited. the 'X' chromosome is received from the mother. The 'Y' chromosome is received from the father.
How does crossing over occur more frequently between genes that are close together on chromosomes?
with some qualification, especially around the centromeres and telomeres, one can say that crossing over is somewhat randomly distributed over the length of the chromosome two loci that are far apart are more likely to have crossover than two loci that are close together.
From: Concepts of Generics
What technique do geneticists use to count and study an individual's chromosome?
Geneticists use a technique called Karyotyping. Scientists take a picture of chromosomes and then arrange them in pairs to end up with 22 chromosomes and another pair that determines sex; chromosome (X,X ) for female or (X,Y) for males.
Then you can determine mutation when some chromosomes are missing, ex: missing chromosome 13 will result in Patau Syndrome, or missing chromosome 18 results in Edward's Syndrome
What happens if a person have more or less chromosomes?
Having additional or missing chromosomes can have a variety of effects, ranging from mild to fatal. For example, females missing an X chromosome (they would normal have two) suffer from a condition known as Turner syndrome, which can cause problems like stunted growth and infertility.
An example of a condition involving an additional chromosome is Trisomy 21, more commonly known as Down syndrome. In this instance, the individual has an extra 21st chromosome--they should have two, but instead have three. This tends to lead to growth defects and mental retardation.
More severe chromosome abnormalities can be fatal--some will result in miscarriage during fetal development.
If a human cell has 46 chromosomes how many would you expect in reproductive cells?
The answer is................46.
What part of the human body is like to the chromosome?
The Brain. Chromosomes contain the genes that contain the instructions to make everything that a cell needs to function. A brain contains all of the information that a person needs to function.
