Do chromosomes contain thousands of segments called?

What do chromosomes contain thousands of?

A chromosome contains hundreds to thousands of genes. Every normal human cell contains 23 pairs of chromosomes, for a total of 46 chromosomes. A trait is any gene-determined characteristic and is often determined by more than one gene.

How many genes are in a chromosome?

Each chromosome contains hundreds to thousands of genes, which carry the instructions for making proteins. Each of the estimated 30,000 genes in the human genome makes an average of three proteins.

What is the name of a section of a chromosome that controls a characteristic?

DNA exists in a cell’s nucleus within structures called chromosomes . Each section of a chromosome that contains the code for the production of a particular protein is called a gene .

What is the shape of chromosomes give its name in the figure?

Chromosome are rod shaped and has a primary constriction or centromere. The arms of the chromosome seem to be attached at the centromere . Depending upon the position of centromere and the length of the arms of the chromosome, there are four types of chromosome.

What is a chromosome ks3?

The chromosomes are found in the nucleus of each cell. Each cell with a nucleus contains chromosomes, which are made from DNA. Human body cells each contain 23 pairs of chromosomes, half of which are from each parent. So, human gametes (eggs and sperm) each contain 23 chromosomes.

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What is it called when chromosomes appear?

prophase. a cell division begins, the chromatin threads coil and shorten so that visible bar like bodies (chromosomes) appear.

How many nucleotides are in a human chromosome?

Each chromosome contains a single very long, linear DNA molecule. In the smallest human chromosomes this DNA molecule is composed of about 50 million nucleotide pairs; the largest chromosomes contain some 250 million nucleotide pairs.

Are segments of DNA that code for a particular trait a combination of DNA and proteins make up?

A gene is a segment of DNA that codes for a particular polypeptide or protein. The genes are located on the chromosomes and determine all of our hereditary traits.