Sentences with phrase «of chromosomes»

The answer is via the little protective caps on the ends of the chromosomes inside your cells.

This is because the two copies of a chromosome in an individual can originate from one and the same ancestor further back in time.

Nice discussion starter for differences in the number of chromosome sets in various organisms.

Work in other organisms shows that having an extra set of chromosomes can boost the number of young and may help the clones adjust to new environments.

DNA makes up the 23 pairs of chromosomes in the human body.

But people carry two copies of each chromosome in every cell, one from mom and one from dad, and at particular sites in a gene the spelling in the DNA can differ.

Among those with the language deficit, they found shared markers in a single region of chromosome 7.

Because the members of a breed have similar stretches of DNA, we can use our 200,000 + genetic markers to determine what part of each chromosome in your dog came from what breed.

This is important because it means researchers can track changes in the size and structure of chromosomes as the cells divide — and potentially detect changes that could lead to disease.

The little tips of chromosomes get shorter every time a cell divides, and this shortening is a mark of cellular aging.

For example, they identified five double crossovers on one arm of chromosome 2 — fewer than expected.

Among these, errors of chromosome segregation lead to infertility.

The sequences of chromosomes 2 and 4 were published in 1999.

They don't have the same number of chromosomes as human cells.

Most such research focuses on mutations in the DNA of chromosomes within the cellular nucleus.

The complex sets of data this yielded provided the backbone for understanding the three dimensional structure and spatial organization of these chromosomes.

The body must then reduce the number of chromosomes by half to go into the sex cells.

Secondly in the process of the separation of chromosomes before they enter the sperm and the eggs, different amounts of the parents DNA enter each time.

But additional chunks of chromosomes also associate with the condition, including at least two to three large regions on chromosome 5.

In recent years, scientists all over the world have investigated the organisation of chromosomes inside cells from species ranging from larger bacteria to human.

Previous research suggests sperm with an abnormal amount of chromosomes may lead to failed pregnancies and birth defects.

The two halves of each chromosome come from the two parents.

Even better, these chromosomes have a pattern of dark and light bands, like a bar code, which is unique for each section of the chromosome.

The high incidence of chromosome abnormalities in clinically recognised pregnancies is well documented, but experience of these problems at the time of conception is extremely limited.

A genome is a map of the chromosomes that identifies the genes for various traits.

Women carry two versions of the chromosome, while men, in addition to the Y chromosome, carry only one.

DNA is the core component of chromosomes, and contains the genetic instructions used by all living organisms and some viruses.

The 46 pairs of chromosomes then divide into 2; leaving 23 pairs.

In short, the cellular machinery works less efficiently in aged eggs, but this is not caused by the age of the chromosomes.

Most people are familiar with the well - known «X» shape of chromosomes, but in fact chromosomes only take on this shape when the cell divides.

«That is what is really required» to get a full history of our chromosomes, he says.

The dance of chromosomes is tightly controlled during cell replication to preserve the genetic makeup of cells.

Their findings offer a better understanding of the mechanisms of chromosome fragile sites and could lead to a breakthrough in identifying new cancer - associated genes.

These features are visible in the enlarged image of chromosome 17 (far right).

Recently, we added a focus on the role of chromosome - associated proteins in cancer.

A genetic test examines a DNA sample of a person's cells for abnormal genes, or analyzes the number, arrangement and characteristics of the chromosomes.

Most of these chromosome problems occur by chance as the embryo divides and grows — not because of problems inherited from the parents.

After several weeks of bathing in this mixture, almost all tissue samples contained some cells with the same number of chromosomes found in sperm.

There is no scientific evidence that a species can change the number of chromosomes within the DNA.

How do you know the sex of a chromosome?

The cell samples are sent to a genetics lab for a count of the chromosomes.

We're a couple of chromosomes away from being apes as it is - surely we have to take the debate to a more sophisticated level.

The discovery might also apply to cancer, because cancer cells often have abnormal numbers and arrangements of chromosomes.

Possible explanations for this so - called junk DNA range from mutation protection to structural support of chromosomes.

The abnormal number of chromosomes seen in this individual may give clues to the origins of cancer.

Time - lapse microscope images show the packing of chromosomes in a chicken cell's nucleus into tiny capsules.

We are also working to show how changes in the structure of chromosomes affect heart development, and to determine how immune cells contribute to the build - up of plaque in arteries.

For cells, the loss or gain of a chromosome is a gamble with fate.