can a parthenogenetically reproduced male have a Y chromosome?
457511
won't happen, parthenogenetic offspring are genetically identical to their parent, i.e. female
1053947
no, because it is a defect on human chromosome 21, where 3 copies are made instead of 2. this has never been seen to occur in the genomes of other organisms.
571971
If I understand your question, you're asking about the origins of the Y chromosome in evolution.  If so, that's a valid question ... in fact, it's a great question!\n\nFirst, understand that this didn't start with a person.  All mammals, birds, reptiles, and most amphibians have a Y chromosome, which indicates that this arose a long time ago in evolution ... the estimate is about 350 million years ago.\n\nMany animals do not have a Y chromosome.  For example, in many insect species (like grasshoppers), the female is XX, and the male is X.  Or in other species (like bees), there is no genetic difference between males and females, but sex is determined by what the larvae is fed during early development.\n\nThe origin of the Y chromosome seems to have occurred about 350 million years ago in some reptile species, where a mutation occurred in an X chromosome that caused all its owners to become male ... the birth of the Y chromosome.  Over time, those genes that produced things advantageous for males to have, would accumulate on the Y chromosome, and those things good for females to have would acumulate on the X chromosome.  For more information, see my second source (the wiki page on the Y-chromosome), or type "origin Y chromosome" into Google.
403754
To my knowledge, there are no snakes that reproduce mostly through asexual means.  Numerous snakes are known to be able to reproduce by parthenogenesis, producing little clones of the mother, but never as a primary mode of reproduction, usually only if males are not available.
1094020
A. be able to reproduce by conjugation.
827633
They are usually fertile and lead ordinary lives as adults. \n\nXYY syndrome  males inherit an extra Y chromosome--their genotype is XYY.  As adults, these "super-males" are usually tall (above 6 feet) and generally appear and act normal.  However, they produce high levels of testosterone.  During adolescence, they often are slender, have severe facial acne, and are poorly coordinated.  They are usually fertile and lead ordinary lives as adults.  Many, if not most, are unaware that they have a chromosomal abnormality.  The frequency of XYY syndrome is not certain due to statistical differences between different studies.  It may be as common as 1 in 900 male births to as rare as 1 in 1500 or even 1 in 2,000.
193025
kinda throws a kink in the debate about homosexuality hermaphrodites can be either male or female only a genetic test at the beginning of their life can tell as they get older and go through puberty their true sex becomes evident
573883
Not always. It depends on what gender you are talking about too. In the case of some male gays I think the X in the XY chromosome could be more dominant, while in the case of some other gays, the dominant one would be the Y and hence the excessive aggro and alpha male syndrome.\n\nIn the case of female, well maybe there is some testro some where.\n\nI'm just surmising, am a happily married monogamous hetero
352274
it depends if youre asking about a sex-linked trait or not.  if a sex-linked trait is in question, then the mother gives the son her x chromosome that has one copy of all the genes on her x chromosomes, the father will contribute the y chromosome.  however, if the trait is x-linked and the father expresses it then there's no way to pass it on to his son as he is only passing on his y chromosome.  if it't not sex linked then it's just a random luck of the draw on which genes that kid will get.
784409
absolutely...hermaphrodites occur in just about any living organism that has differentiated genders...it's caused by a mix-up in the genetic pattern that determines physical gender differences during gestation/maturation...
678915
no, I don't think they arrived fully formed male/female anything.  the genders started as single cells that split off in asexual reproduction, then perhaps some hermophodite reproduction then perhaps 2 genders.  There are some worms that can fertilize themselves.
110155
In most cases, a hermaphrodite will have one sex that is more dominant than the other.  The recessive sex organs are usually altered or removed leaving the person with only one set of sex organs.  In that case, the point of whether a hermaphorodite is gay or not depends on their choices later in life.
875129
Parthenogenesis - do a little homework
692724
it is possible that half of the chromosomes in an ovum are always paternal, but that is not always the case... \n\nbecause in an organism with 56 chromosomes, even if crossing-overs are not taken in consideration, there are still 268,435,456 possible combinations of the gametes. there's a chance that all chromosomes in the ovum would be paternal. there's also a chance that all chromosomes in the ovum would be maternal. and there's also chances of any other combinations in between like more maternal than paternal chromosomes, or more paternal than maternal chromosomes, or equal numbers of paternal and maternal chromosomes.
1006315
A haploid life cycle is a cycle in which an animal only has one copy of each chromosome.  As far as I know in animals this only happens in parthenogenetic insects like roaches and aphids.\n\nEvery once in a while the parthenogenetic insects like to mate and thus generate diploid offspring, which have copies of their chromosomes.
412260
Dr.Hargobind Khurana,Nobel laureate, who cracked the genetic code.If you mean gender,Its  due to 'x' and 'y' chromosome.Female of species possess xx chromosome,whereas male part possess a 'x' and a 'y' chromosome.There are two chance that can occur during fertilization between male and female gametes, XX and XY.So father part of 'x' and 'y' play a vital role in determining sex of offspring.
1096030
As a species, no. A sexually reproducing species has to have an EVEN number of chromosomes.\n\nAs indivdiuals, sure. There are thousands of individuals walking around today who have 47 chromosomes.