Whats the different from a male and female DNA in gametes and how are they the same?
409310
Assuming we're talking about humans ...\n\nIn the female gamete (the ovum, or egg cell) the DNA in the nucleus is contained in 23 chromosomes.  One of these is the sex chromosome, but this is always an X chromosome.  Outside the nucleus are additional pieces of DNA ... most notably, DNA in the mitochondria of the cell, which will get passed intact to the offspring.\n\nIn a male gamete (spermatozoan or sperm cell) the DNA in the nucleus is also contained in 23 chromosomes.  One of these is the sex chromosome and is either a Y or an X chromosome.  This will determine the gender of the offspring.  Sperm cells also have DNA in their mitochondria, but these are discarded upon fertilization (so the offspring gets mitochondrial DNA exclusively from the mother).\n\nUpon fertilization, the two gametes make a zygote.  The 23 chromosomes from each (haploid) gamete produces a complement of 46 total chromosomes in the (diploid) zygote.  The pair of sex chromosomes determines the gender of the developing offspring ... XY is a boy, XX is a girl.
148249
the sperm which carry the male sex gene swim faster than the sperm which carry the female sex gene, but the 'female sex sperm' live longer - upto 3 days, compared to the male carriers, which last about 1 day. \nso, to try and conceive a boy, have intercourse right smack bang(literally) when ovulation starts(you can get tests to find out when you are)hopefully, they will find the egg faster. to try for a girl, try having intercourse about 3 and 2 days before ovulation is due.\nits not 100% effective obviously, but worth a try...it's science.
910316
chromosomes are what makes you they carry your genetic information eg hair colour eye colour, you have 46 chromosomes in each cell or 23 pairs, but in sex cells the egg and the sperm u have only 23 as they join up with the opposite sex cell to make 46. thats meitosis, miosis is the development of ordinary body cells, this is done so if for example you cut your self you body is able to repair itself, hope you understand this and it was useful for you :)
814544
Meiosis is a completely different process from mitosis.\n\nI should stop doing other people's homework...\n\nMeiosis ends with a different amount of cells, and the cells as a result of meiosis only have 1/2 of the chromosomes of the original cell, where in mitosis, the daughter cells have the same amount of chromosomes.\n\nIn meiosis, there are two divisions. \n\nMeiosis occurs only in reproductive cells. For example, in humans, sperm has 23chromosomes and eggs have 23 chromosomes, a normal human cell has 46, which is why it takes two reproductive cells to create a living thing.\n\nI could go on and on, but I have to return to my own work.
108459
An egg, and a sperm both contain a nucleus which holds half of our DNA (23 chromosomes). All of our other cells contain 46 Chromosomes. In the lab, they harvest an egg from which ever species they are cloning, and they remove the nucleus. They can then take the nucleus of a normal 46 chromosome cell and put it inside the egg- where it's nucleus used to be. The egg then "thinks" it is fertilized and will start to divide, and grow. This embryo is an exact replica of the parent cell. Cloning is a form of asexual reproduction, because sex was not involved in the creation of the new embryo. There are many ethical issues surrounding cloning. Some argue that scientists are "playing God" because they are creating new life. Some say that if a human were to be cloned- it would have no soul because it was not created by God. There are too many ethical issues to type here, but you get the idea. You'll have to decide for yourself where you stand. Hope this helps. good luck in school
621951
all normal males are XY.  all normal females are XX.  the female always donates 1 X chromosome to the offspring.  the male donates either an X or a Y to the offspring (50% chance of each event).  If the male donates an X, the offspring will be XX and female.  if the male donates a Y, the offspring will be XY and male.
580833
sex-linked genes which can still be classified into x-linked genes and y-linked genes... ;p
839769
Meiosis is specialized cell division (similar to mitosis). Mitosis results in 2 identical daughter cells from a single cell. Meiosis results in 4 daughter cells (which may not be identical) but each daughter cell only has one set of chromosomes, instead of the 2 sets of chromosomes present in the original cell. Each of these daughter cells is called a gamete. In sexual reproduction a male gamete and a female gamete (sperm and egg) fuse. Each contributes a single set of chromosomes so the resulting fused cell (zygote) has two sets like the cells that originally formed the gametes.
596998
A female egg has 23 chromosomes. A male sperm has 23 chromosomes. Thus, when a sperm fertilizes an egg, the embryo has 46 chromosomes. Women have two x chromosomes, whereas males have an x and a y. Each contribute one. The woman will always contribute an x. If the man contributes an x, the child will be female. If he contributes a y, the child will be male. Abnormalities can be caused by an added or subtracted part or whole of a chromosome. For example, trisomy 21, or down dyndrome, involves an extra chromosome. Kinefelter's involves a child having an xxy genotype, rather than the normal xy for a male.
888453
B is the correct answer.  Females have 2 X chromosomes so they cannot contribute a Y chromosome to a zygote.  Also to be male a Y chromosome must be present (and posess the SRY gene).
972775
In short Meiosis and Fertilisation.\n\nFertilisation brings each haploid gamete cell together, that is, a sperm and an egg. Each of these gametes carries a single copy of each chromosome. It is not until fertilisation that the chromosomes from each parent come together to form the diploid embryo.\n\nBut it's important to note that although we are walking around with 2 copies of our chromosomes, our gametes only have one. This is because the gametes are formed through the process of Meiosis, which halves our DNA. This allows the offspring to have a copy of each chromosome from each parent.
268018
Inside of each cell of the human body is a nucleus.  Inside of it are genes and chromosomes.  Inside of those are complex strands of proteins and amino acids that together are calle deoxyribonucleic acid or DNA.  This DNA contains the "blueprint" for an entire human being.  When two people mate, their DNA gets combined to form a new human, unique but having many characteristics shared by the parents' DNA.  Have you ever heard the term "genetic lottery"?  This is because each time the DNA from two humans is combined to make a third new human, the combination of DNA is to an extent random.  Only to an extent.  I inherited my mother's bad vision and my father's bad teeth.  I inherited my father's nose.  But I am taller than either of my parents.  My hair is a completely different color than either of theirs.  Sometimes DNA, genes, and chromosomes are imperfectly formed.  Each gene controls certain characteristics about a human being.  Completely normal parents can wind up having a baby with Downs' Syndrome (Mongolism, a type of mental and physical retardation).  Completely normal parents can wind up having a dwarf baby.  But other problems are passed down directly from one generation to the next.  Hemophilia is one example, the people whose blood won't clot.  They can bleed to death from a cut.  If they fall they can bleed internally until they die.  Hemophilia is passed down from one generations to the next in the female line.  Queen Victoria, who was related to most of the people of the royal and imperial houses of pre-World War One Europe, was a carrier of the genetic defect of hemophilia.  The women who carry this are usually immune to it.  It is the boys they give birth to that can suffer and die from uninterrupted bleeding due to this genetic defect.  How to prevent one's son from being hemophiliac if one is a female carrier?  Adopt.
750284
Meiosis occurs after sexual maturity in both male and females.\nIn males in happens almost all the time after maturity, as males need to produce millions of sperm.\nIn females it happens approximately once a month and happens much more slowly, producing one gamete (egg or oocyte) for use.
983209
your answer should be --- mamalian or human reproduction. depends on if this is a question for a subject being studied or not, and what subject it is.\n\nbecause the zygote is the cell that is formed by the fusion of two haploid gametes, one from a male and one form a female.\n\nafter the first diploid cell is created, it is no longer reproduction, but embryonic development, since there are more than one cell once they start dividing, and they all are diploid.\n\nin most other reproductive processes, the gametes contain more than one set of chromosomes, making the gametes polyploid rather than haploid, therefore, the zygote isn't diploid.
204501
The early foetus develops both mullerian and wolfian ducts . It is through programed cell death that differentiation occurs into male or female. The zygote is therefore hermathrodite.\n\nAnyway the definition of maleness in humans is the presence of the SRY gene on the long arm of the Y chromosome, so anybody with the long arm Y chromosome is male from conception. \n\nIn insects such as the fruitfly it is the number of X chromosomes that determines sex, so again straight away from egg fertilisation, XY is male.\n\nI do not know for sure, but i'd imagine men have nipples because only one gene is required, and this is found on the X chromosome.
1114858
Neither one is more important than the other, since both are required to keep the system going.  However, as the limiting factor in reproduction is how fast women can gestate young, give birth, and recover enough to gestate another child, you need far fewer males than females (as males can continually impregnate other females while pregnant females gestate young).\n\nHowever, to dispel a myth, while females do comprise slightly more of the population than males, nature produces 105 males to every 100 females in human beings.  \n\nThe difference which leads to the female majority in humans is the result of the fact males are much more likely to be victims of murder, are much more likely to die accidental deaths, are more likely to be killed in the line of work, be killed during wars or battles, are more likely to suffer from a chronic genetic disease (most are carried on the X chromosome, so while you have to have two defective copies of the gene in females in order for them to be afflicted by it and not be a carrier, males only have one copy of the genes on the X chromosome, so they need only receive one defective copy to cause them to suffer from the disease... and no, this doesn't make females biologically superior since it proves the mother of the offspring specifically had defective genetic traits which were passed on to the male offspring) etc... etc... etc...\n\nAnd nature seems to understand this, and hedges its bet by producing more males to shore up the numbers.\n\nP.S.-- We cannot clone viable sperm.  Males still have to manufacture the stuff au naturel for the process to work.
771566
No, gametes are what starts a person's whole life cycle by fertilization. They consists of 23 chromosomes and a person needs 46 chromosomes