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Is it true that egg and sperm each have twice the number of chromosome as parent organism?
Wiki User
∙ 10y ago
No. Egg and Sperm gametes actually have half the number of chromosomes as the cells of the parent organism.
Wiki User
∙ 10y ago
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How does the alternation of meiosis and fertilization in the life cycles of sexually reproducing organisms maintain the normal chromosome count for each species?
Simple, Meiosis reduce the chromosome number in half while fertilization doubles the chromosome number. n=chromosome number Meiosis = 2n (primordial germ cells) ----> n (sperm cell/egg cell/polar bodies) Fertilization = sperm (n) + egg (n) ----> 2n (zygote)
How is a baby sexs determine?
It's determined by the genetic chromosome of the sperm. Women have only one X chromosome in the egg (both egg and sperm have 23 pairs of chromosomes, which unite to form 46). On the other hand, men have either X or Y chromosomes. If an egg (X chromosome) joins with an X chromosome sperm, the result will be a girl. If an egg (X chromosome) joins with a Y chromosome sperm, the result will be a boy. In other words: the guy determines the sex of a baby :)
Why is a human cell containing 22 autosomes and a y chromosome a sperm?
Human somatic (body) cells contain two sets of 23 chromosomes. Human gametes (sperm and egg cells) contain one set of 23 chromomes -- 22 autosomes and 1 sex chromosome. Only a sperm cell can carry a y chromosome. A sperm cell can also carry an x chromosome. The ovum can carry only an x chromosome, never a y chromosome. So a cell containing 22 autosomes and a y chromosome must be a sperm cell.
Why are egg and sperm cells haploid?
are little more than flagellated nuclei. Each consists of a head, which has an acrosome at its tip and contains a haploid set of chromosomes in a compact, inactive, state.
Can you arrange the following in order from largest to smallest in size DNA NucleotideNucleuscell chromosome?
From smallest to largest: DNA (where DNA = short sequences of nucleotides) gene chromosome nucleus sperm cell
When a cell such as an egg or sperm only contains one copy of each pair of chromosomes from the parent cell you call this chromosome number?
haploid.
Does sperm contain x and y chromosome?
In humans the male sperm contains EITHER an X chromosome, or a Y chromosome since human gametes are haploid (n) in chromosome number.
What process union of egg and sperm restores chromosome number?
Fertilization.
How are daughter cell differ from the parent cell?
The parent cell will be diploid and contain paired chromosomes. The haploid cell will contain only one copy of each chromosome. In humans for example there are 23 pairs of chromosomes. In a somatic cell, which is diploid, the 23 pairs are present. In a gamete (sperm or egg cell), which is haploid there are only 23 chromosomes - unpaired. This is so that when the sperm and egg meet at fertilisation there are 46 chromosomes - 23 pairs - the correct number for the organism.
How many different kind of sperm?
Two, sperm that has an X chromosome and sperm that has a Y chromosome, all things being normal all sperm have the same chromosome count.
Why is it neccessry to reduce the chromosome number of gametes but not other cells of an organism?
Gametes are sperm and egg cells. When the sperm fertilizes the egg, their genetic material is joined to form a new cell called a zygote. Because both the sperm and egg cells have half the number of chromosomes as in normal body cells, the zygote will have the full number of chromosomes as in normal body cells.
How are haploid daughter cells different from the parent cell?
The parent cell will be diploid and contain paired chromosomes. The haploid cell will contain only one copy of each chromosome. In humans for example there are 23 pairs of chromosomes. In a somatic cell, which is diploid, the 23 pairs are present. In a gamete (sperm or egg cell), which is haploid there are only 23 chromosomes - unpaired. This is so that when the sperm and egg meet at fertilisation there are 46 chromosomes - 23 pairs - the correct number for the organism.
What is a cell with one-half the regular number of a chromosome?
A sperm cell or an egg cell.
What is considered aneuploid?
aneuploidy usually reslts from non-disjunction (failure to separate) of homologous chromosomes during meiosis (the creation of gametes). It results in an organism having the wrong number of a certain chromosome. The two most common forms are monosomy (only one chromosme eg. Turner syndrome) and trisomy (three of a chromosome eg Down and Klinefelter syndrome) from non-disjunction, the two chromosomes line up at the equater of a cell as an X, ready to separate, but it doesn't, this reults in one egg/sperm having 0 of a chromosome and another will have 2. If the one with 0 then forms a zygote with a normal egg/sperm the zygote could have only 1 chromosome -from the normal egg/sperm. If the one with 2 forms a zygote the zygote will have 3 of the chromosome, 2 from the mutated gamtete and 1 from the normal gamete.
Which chromosome from the sperm is necessary to produce a female?
Y chromosome
Is it the guy's sperm that makes the gender of a baby?
Yes. Sperm carry either an X or a Y chromosome. The eggs from a female's ovaries is always X. If the sperm has an X chromosome, the baby will be female. If the sperm has a Y chromosome, the baby will be male.
How does the alternation of meiosis and fertilization in the life cycles of sexually reproducing organisms maintain the normal chromosome count for each species?
Simple, Meiosis reduce the chromosome number in half while fertilization doubles the chromosome number. n=chromosome number Meiosis = 2n (primordial germ cells) ----> n (sperm cell/egg cell/polar bodies) Fertilization = sperm (n) + egg (n) ----> 2n (zygote)
