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How do germ-cells make a single set of genes from the normal two copies that all other cells in the body have?
Wiki User
∙ 12y ago
If progeny plants inherited a single whole gene set from each parent, then the aw of independent assortment would not work. this is because two different characteristics would be linked to each other and cannot be independently inherited.
This is explained by the fact that each gene set is present not as a single long thread of DNA, but as separate independent pieces, each called a chromosome. Thus, each cell will have two copies of chromosome, one each from male and female parents. Each germ cell will take one chromosome from each pair and these may be either of maternal or paternal origin. When two germ cells combine, they will restore the normal number of chromosomes in the progeny, ensuring the stability of the DNA of the species.
Wiki User
∙ 12y ago
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How could many cells contain copies of the nucleic acid from one virus?
The cells could have all been produced via asexual reproduction from a single virus cell, or have been rroduced for by normal reproduction. In this sense, the daughter cells would contain the same nucleic aid, as they come from the same virus cell.
How many copies of each chromosome are found in most animal cells?
Animals cells are diploids, meaning they have 2 copies.
Why do bone cells make exact copies of themselves?
When bone cells divide they must produce cells exact copies of themselves.
Is the percentage of cells in the resting stage is higher in cancerous cells than normal cells?
No, cancer cells are more active than normal cells. Cancer cells are always dividing at a faster rate than normal cells.
How many copies of each chromosome do haploid cells have?
22
One difference between a cancer cell and a normal cell is that?
a. cancer cells divide uncontrollably. b. normal cells cannot make copies of DNA. c. cancer cells cannot make copies of DNA. d. normal cells divide uncontrollably. (A) cancer cells divide uncontrollably
What is found inside gametes?
Gametes are germ cells. So in germcells the chromosomes are found which carry DNA as genetic material or heriditary material allthough in gamates only half of the no. of chromosomes are found as the two germ cells i.e. of mother and father fused toghter to form zygote which will then having exactlly the same no. of chromosomes as that of normal cells of that species.
How could many cells contain copies of the nucleic acid from one virus?
The cells could have all been produced via asexual reproduction from a single virus cell, or have been rroduced for by normal reproduction. In this sense, the daughter cells would contain the same nucleic aid, as they come from the same virus cell.
What is the role of red cells?
Red blood cells are highly specialized for oxygen transport. They lack a nucleus and instead, contain many copies of hemoglobin. Red Blood cells move single file through the capillaries
How do hela cells differ from other cells?
Research has shown that HeLa cells have an active form of the enzyme Telomerase (not present in normal cells, but can be found in most cancerous cells). Telomerase is active during cell division, and prevents the shortening of telomeres - a mechanism that is associated with ageing and eventual cell death.
Do all normal body cells in humans have the same karyotype?
All normal cells in the human body have the same number of chromosomes because of the process of mitosis. Each cell is a clone.
How many copies of each chromosome are found in most animal cells?
Animals cells are diploids, meaning they have 2 copies.
How many copies of each chromosome are found in animal cells?
Animals cells are diploids, meaning they have 2 copies.
Which condition results when cells receive three copies of chromosomes 21?
Down syndrome results when cells receive three copies of chromosome 21.
Why do bone cells make exact copies of themselves?
When bone cells divide they must produce cells exact copies of themselves.
Is genetic material single stranded or double stranded rna?
If the genetic material is RNA, it will usually be single stranded. Only viruses contain double stranded RNA. The main genetic material in eukaryotic cells (eg. animal cells) is DNA. Single stranded RNA copies of this (known as mRNA) are made in order for proteins to be synthesized.
Why does egg of birds which is a single cell so big that it can be seen through unaided eyes?
The shell of an egg needs to be big enough to keep the chick inside until it is ready to hatch. The "Egg" you see is not a single cell. The cells are inside the shell you see. These single cells are like normal cells, you need microscopes to see them.
