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What is the biological determination system for the sex of an offspring?
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What does an x and y chromosome identify?
In the cytological terminology x and y chromosomes are identified as sex chromosomes. In human being these chromosomes are responsible for determination of sex in the offspring.
When was it realised that it is the father who determines the sex of the child?
Nettie Stevens and Edmund Beecher Wilson described the XY sex determination system in 1905.
What is the sex of an offspring with kinefelters syndrome?
no offspring
What is the definition of sex chromosomes?
A sex chromosome helps in the determination of sex in an organism.
What is the female chromosome?
The X chromosome is one of the two sex-determiningchromosomes in many animal species, including mammals (the other is the Y chromosome). It is a part of the XY sex-determination system and X0 sex-determination system. The X chromosome was named for its unique properties by early researchers, and this resulted in its counterpart being named the Y chromosome for the next letter in the alphabet when it was discovered later.
What does an x and y chromosome identify?
In the cytological terminology x and y chromosomes are identified as sex chromosomes. In human being these chromosomes are responsible for determination of sex in the offspring.
When was it realised that it is the father who determines the sex of the child?
Nettie Stevens and Edmund Beecher Wilson described the XY sex determination system in 1905.
What type of cells does the reproductive system produce?
TO PRODUCE SEX CELLS involved in the production of offspring
Compare and constrast autosomes and sex chromosome?
Autosomes are the somatic chromosomes which control the body characters or somatic characters and sex chromosomes help in the determination of sex at the time of gametic union to form the zygote.
What is the sex of an offspring with kinefelters syndrome?
no offspring
What is the definition of sex chromosomes?
A sex chromosome helps in the determination of sex in an organism.
What is one of a pair of chromosomes that are involved in sex determination of an idividual?
The pair of chromosomes involved in sex determination is called sex chromosomes, rest of the chromosomes are called autosomes.
What is the female chromosome?
The X chromosome is one of the two sex-determiningchromosomes in many animal species, including mammals (the other is the Y chromosome). It is a part of the XY sex-determination system and X0 sex-determination system. The X chromosome was named for its unique properties by early researchers, and this resulted in its counterpart being named the Y chromosome for the next letter in the alphabet when it was discovered later.
How does a mutation in a sex differ from a from a mutation in a non-sex cell?
A mutation in a sex cell can be passed on to an offspring. A mutation in a non-sex cell cannot be passed on to an offspring.
What determines the sex of a human?
Whether they have 2 X chromosomes= girl, of one X chromosome and one Y chromosome= boy
What is something that carrys genes that determine the sex of offspring called?
Gametes carry genes that determine the sex of an offspring.
Does a kangaroo give birth?
nether, but the sperm does. there are 2 different types of sperm, one that makes the offspring male and one that makes the offspring female. the thing that makes the 2 types of sperm are called chromosomes.This is what i found on wikipedia:XX/X0 sex chromosomesMain article: XY sex-determination system The XX/XY sex-determination system is the most familiar sex-determination systems, as it is found in human beings, most other mammals, as well as some insects. However, at least one monotreme, the platypus, presents a particular sex determination scheme that in some ways resembles that of the ZW sex chromosomes of birds, and also lacks the SRY gene, whereas some rodents, such as several Arvicolinae (voles and lemmings), are also noted for their unusual sex determination systems. The platypus has ten sex chromosomes; males have an XYXYXYXYXY pattern while females have ten X chromosomes. Although it is an XY system, the platypus' sex chromosomes share no homologues with eutherian sex chromosomes.[1] Instead, homologues with eutherian sex chromosomes lie on the platypus chromosome 6, which means that the eutherian sex chromosomes were autosomes at the time that the monotremes diverged from the therian mammals (marsupials and eutherian mammals). However, homologues to the avian DMRT1 gene on platypus sex chromosomes X3 and X5 and suggest that its possible the sex-determining gene for the platypus is the same one that is involved in bird sex-determination. However, more research must be conducted in order to determine the exact sex determining gene of the platypus.[2]In the XY sex-determination system, 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. The XY sex chromosomes are different in shape and size from each other unlike the autosomes, and are termed allosomes.XX/X0 sex determinationMain article: X0 sex-determination system 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. This system is observed in a number of insects, including the grasshoppers and crickets of order Orthoptera and in cockroaches (order Blattodea).The nematode C. elegans is male with one sex chromosome (X0); with a pair of chromosomes (XX) it is a hermaphrodite.ZW sex chromosomesMain article: ZW sex-determination system The ZW sex-determination system is found in birds and some insects and other organisms. 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). In the chicken, this was found to be dependent on the expression of DMRT1.[3]HaplodiploidyMain articles: Ploidy and Haplodiploid sex-determination system Haplodiploidy is found in insects belonging to Hymenoptera, such as ants and bees. 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. This is believed to be significant for the development of eusociality, as it increases the significance of kin selection. This[clarification needed] is common also in wasps that are parasitic and in the male greenflies.
