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With people, girls have XX and guys have XY chromosomes.
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This mechanism of how this genetic sex determination works varies:-
With many animals, females have two of the same kind of sex chromosome (XX), while males have two distinct sex chromosomes (XY). Some species (including humans) have a gene SRY on the Y chromosome that determines maleness; others (such as the fruit fly) use the presence of two X chromosomes to determine femaleness.
There are variants to this mechanism to be found in insects which use an XX/X0 mechanism:-
In this variant of the XY system, females have two copies of the sex chromosome (XX) but males have only one (X0). The 0denotes the absence of a second sex chromosome.
Another variation found in birds uses the ZW chromosome set:-
The ZW sex-determination system is reversed compared to the XY system: females have two different kinds of chromosomes (ZW), and males have two of the same kind of chromosomes (ZZ)
One must also consider the way animals such as bees determine sex, this is called Haplodiploidy:-
In this mechanism, unfertilized eggs develop into haploid individuals, which are the males. Diploid individuals are generally female but may be sterile males. Thus, if a queen bee mates with one drone, her daughters share ¾ of their genes with each other, not ½ as in the XY and ZW systems.
With other animals genes play no part in the determination of sex, for instance in some species of reptiles, including alligators, some turtles, and the tuatara, sex is determined by the temperature at which the egg is incubated
While other species, such as some snails, practice sex change: adults start out male, then become female. In many tropical reef fish, the dominant individual in a group becomes female while the other ones remain male,
Also in some species individuals have no real sex differentiation at all, for instance Earthworms are hermaphrodites.
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Is the sex offspring is determined by the chromosome the female parent gives?
No, the male determines the sex of a child.
How do you find possible phenotypes of offspring?
Mendel Diagrams. If the offspring gets a dominate gene from both parents, the offspring will exhibit traits from the dominate gene. If the offspring gets a dominate gene from one parent and a recessive gene from another, the offspring will exhibit traits from the dominate gene. If the offspring get a recessive gene from both parents, the offspring will exhibit traits from the recessive gene.
A trait which is inherited on sex chromosomes is?
Sex-linked traits have alleles that are passed from parent to child on a sex chromosome.
What are the differences between autosomes and sex chromosomes?
Autosomes are the chromosomes that are not the sex chromosomes. 22 of the 23 pairs of human chromosomes are autosomes and the final 23rd pair are the sex chromosomes, one of each received by the offspring by the parental generation (one from the mother and one from the father). Moreover, the sex chromosomes dictate the sex of the offspring; males have XY and females XX in most cases, but as long as there is a Y chromosome, the offspring is considered a male.
Who determines the sex of a child?
The generally accepted theory is that males determine the sex because males can donate both an X chromosome or Y chromosome, while females can only donate an X chromosome to their offspring :D Hope this Helped
Which sex chromosome determines if an offspring is male or female in humans?
In humans, which sex chromosome determines if an offspring is a male or female?
What determines the sex of the offspring.?
For humans x or y chromosome from father
Is the sex offspring is determined by the chromosome the female parent gives?
No, the male determines the sex of a child.
What carries genes that determines the sex of a offspring?
In humans it is the Male.
Do humans only pass sex-linked traits to their offspring?
Humans only pass traits, sex-linked or not, to their offspring. There is no way to pass a trait to anyone except offspring unless through gene implant.
What determines the sex of the human?
The genes that are carried in the sperm to the ova. If the 23rd chromosome of the sperm is 'X', the offspring will be female. If it is 'Y', the offspring will be male.
In human which sex chromosome determines if an offspring is a male or female?
In humans, which sex chromosome determines if an offspring is a male or female?
What determines if the gene for periodic paralysis is passed on?
A parent with the gene has a 50% chance of passing it along to each offspring, and the likelihood of passing it on is unaffected by the results of previous pregnancies.
What causes a chicken to be a male or female?
The sex of a chicken is determined by genes when the egg is fertilized. It should be a 50/50 chance of male or female. And in the case of chickens it is the females that have the xy gene that determine sex and males that carry the xx gene, this is opposite of mammals where males with their xy gene determine the sex of the offspring.
What is a the male and female genotype?
The genotype for a male is XY. A female is XX. The 23rd homologous pair is the sex gene that determines this.
What are some key differences between horizintal gene transfer gene transfer and vertical descent with mutation?
horizontal gene transfer refers to a transfer of DNA to another cell that is not its offspring. Vertical occurs when 2 organisms have sex with their penis and produce offspring, it receives genetic material from ancestors (parents)
What determines the genes that determines the sex?
the answer is sex chromosomes
