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In mammals, including humans, males have one X and one Y chromosome (XY) while females have two X chromosomes (XX). The presence of the Y chromosome in males determines their heterogametic status, as the Y chromosome carries the SRY gene responsible for male development. In contrast, females do not have a Y chromosome, making them homogametic with two X chromosomes.
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Why is it believed that the father determines the sex of his children?
In humans, the sex of an individual is determined by what combination of sex chromsomes he or she possesses. The sex chromsomes are called 'X' and 'Y' (because of their shape). Females possess two copies of the X chromosome, while males have one X and one Y. In more technical language, in humans the female is the homogametic sex and the male is the heterogameticsex. These terms give a clue to the answer to your question. Females can only produce one type of egg, those with an X chromosome, since they only have one type of sex chromosome (the X) to work with. Males, on the other hand, can produce two kinds of sperm: those carrying an X chromosome, and those carrying a Y. Since every human--male or female--carries at least one X chromosome, and the female can only produce gametes with X chromosomes, the male determines the sex of the child, because if he contributes another X chromosome, the child will be female, and if he contributres a Y, the child will be male. Note: in some other organisms, such as birds, the situation is reversed: the female is the heterogametic sex, and the male the homogametic sex. So in birds, the female determines the sex of the offspring.
What term refers to the biological dimension of being a male or female human being?
Sex is the term that refers to the biological dimension of being a male or female human being.
What is the human male gamete called?
The male gamete is a sperm. The female gamete is an ova or egg.
A human baby is born with two X chromosomes. What must be true about this baby?
the baby is a female
Are male and female human fingerprints the same?
No, male and female human fingerprints are not the same. While both males and females can have similar general fingerprint patterns (whorls, loops, arches), the specific details, size, and spacing of ridges can differ between individuals.
What is a z chromosome?
A Z chromosome is a sex chromosome in a species in which the female is heterogametic (i.e. has different sex chromosomes). The counterpart is the W chromosome. In an XY system (e.g. humans), the male is heterogametic, XY, and the female is homogametic, XX. In a ZW system, the male is homogametic, ZZ, and the female is heterogametic, ZW. Examples of species with ZW systems include all birds, many reptiles, fishes and some insects.
Why male is called heterogametic?
Male is called heterogametic because they produce two different types of gametes (sperm), carrying either an X or a Y chromosome. In humans, males are XY, which means they determine the sex of the offspring. On the other hand, females are homogametic, as they produce only one type of gamete (eggs) carrying an X chromosome.
What is the only lizard that uses asexual reprodution?
Female Komodo dragons (the largest lizard) can produce offspring by parthenogenesis when no male is available for sexual reproduction. Their offspring are homozygous at every locus including having identical sex chromosomes. Thus the females produce all males because, unlike mammals, females are the heterogametic sex (ZW) while males are homogametic (ZZ). Source: http://users.rcn.com/jkimball.ma.ultranet/BiologyPage/A/AsexualReproduction.html
Why is it believed that the father determines the sex of his children?
In humans, the sex of an individual is determined by what combination of sex chromsomes he or she possesses. The sex chromsomes are called 'X' and 'Y' (because of their shape). Females possess two copies of the X chromosome, while males have one X and one Y. In more technical language, in humans the female is the homogametic sex and the male is the heterogameticsex. These terms give a clue to the answer to your question. Females can only produce one type of egg, those with an X chromosome, since they only have one type of sex chromosome (the X) to work with. Males, on the other hand, can produce two kinds of sperm: those carrying an X chromosome, and those carrying a Y. Since every human--male or female--carries at least one X chromosome, and the female can only produce gametes with X chromosomes, the male determines the sex of the child, because if he contributes another X chromosome, the child will be female, and if he contributres a Y, the child will be male. Note: in some other organisms, such as birds, the situation is reversed: the female is the heterogametic sex, and the male the homogametic sex. So in birds, the female determines the sex of the offspring.
What is female peguin called?
I'm reasonably sure it's a hen, and males are cocks. (Don't snicker, even if you are a disgruntled female.) This is the correct nomenclature for game and domestic fowl, and I think it carries over to all birds. Otherwise, you could refer to them as "ZW penguins", after their heterogametic chromosome makeup (unlike most , but not all, species, in which the male is the heterogametic sex), or simply "the female". If the latter is good enough for David Attenborough, it's good enough for me.
What is a female peguin called?
I'm reasonably sure it's a hen, and males are cocks. (Don't snicker, even if you are a disgruntled female.) This is the correct nomenclature for game and domestic fowl, and I think it carries over to all birds. Otherwise, you could refer to them as "ZW penguins", after their heterogametic chromosome makeup (unlike most , but not all, species, in which the male is the heterogametic sex), or simply "the female". If the latter is good enough for David Attenborough, it's good enough for me.
What is the classification of chromosomes?
One classification of chromosomes is into circular and linear. Prokaryotes have circular chromosomes, but they are not geometrically circular - better to say they are in the form of a loop, so that the DNA has no end. Eukaryotic cells have linear chromosomes in the nucleus, but circular chromosomes in mitochondria and chloroplasts, probably reflecting their origins as independent prokaryotes.Another classification is into sex chromosomes and autosomes. Sex chromosomes are responsible for sex determination in some, but not all, organisms. In humans the sex chromosomes are called X and Y, and the female is the homogametic sex (because all gametes must carry an X), while the male is the heterogametic sex (XY). In birds it is the other way round: the male is homogametic (WW) and the female heterogametic (WZ).Another form of classification is to number the autosomes. This is done with Arabic numerals, starting with the longest chromosome. Thus the longest human chromosome is chromosome 1, the next longest is chromosome 2, and so on. Unfortunately early microscopists incorrectly ranked the two smallest, and the Human Genome Project found that chromosome 22 is actually longer than chromosome 21, but the names have stuck.
What are the two sexes of human being?
Male and female..
What is spanish word for human?
humano/a (male/female)
What the male and female do to bring a baby human?
Mate.
Can a male donkey get a female human pregnant?
yes
What would the offspring of a male negro human and a female CAUCASIAN human be?
A normal human being.
