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Rick Satterfield
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What is the male genotype in ZW sex chromosomes system?
ZZ
Which male genotype in the ZW sex chromosome system?
In the ZW sex chromosome system, the male genotype is ZZ. The letter Z represents the presence of a dominant male-determining gene, while the letter W represents the absence of this gene, which determines female development. Therefore, individuals with the ZZ genotype develop as males in this system.
What is the male genotype in the ZW chromosome system?
ZZ
Which is the male genotype in the zw chromosome system?
ZZ Novanet Swag
What is a z chromosome?
The Z chromosome is a sex chromosome found in birds, reptiles, and insects. In species with ZW sex determination, females have two Z chromosomes (ZZ) and males have one Z chromosome (ZW). The Z chromosome plays a role in determining the sex of an individual.
What is the male genotype in ZW sex chromosomes system?
ZZ
Which is the male genotype in the ZW in sex chromosome system?
ZZ Novanet Swag
Which male genotype in the ZW sex chromosome system?
In the ZW sex chromosome system, the male genotype is ZZ. The letter Z represents the presence of a dominant male-determining gene, while the letter W represents the absence of this gene, which determines female development. Therefore, individuals with the ZZ genotype develop as males in this system.
What is the male genotype in the ZW chromosome system?
ZZ
Which is the male genotype in the zw chromosome system?
ZZ Novanet Swag
What is a z chromosome?
The Z chromosome is a sex chromosome found in birds, reptiles, and insects. In species with ZW sex determination, females have two Z chromosomes (ZZ) and males have one Z chromosome (ZW). The Z chromosome plays a role in determining the sex of an individual.
What do males have in their DNA that starts with a Y?
That's not a DNA, it's a collection of genes that makes up the Y-chromosome. It's not even exclusively a male thing. Different species have different types of chromosomes to determine the sexes. For instance, the male komodo dragon has chromosomes ZZ, while the female has ZW, therefore the female is the sex determining sex.
What is the genotype of a male and female?
These genotypes are determined by a human's 23rd pair of chromosomes. If the subject is female, she has two X's reading XX. If it is male, then his genotype will read XY. There is a 50-50 shot of each. This is because a woman donates one chromosome (she only has two X's so it is inevitable that she will donate an X), and a man donates one of his. If a man donates his 'X' then there will be two X's and the child will be female. If he donates his 'Y' then the child will be male.Male is XY, female is XX. There are, however, other genotypes (XXY, XXX, XO...) and not all people have a phenotype that goes with their genotype.
How do chromosomes determine sex?
In Human Beings two chromosomes normally determine a persons sex. If a person has two X chromosomes, (XX), that person will be a female. If a person has an X and a Y chromosome, that person will be a male. Most people get 23 chromosomes from their mother and 23 from their father. Thus, most people have 46 chromosomes. They get either an X or a Y chromosome from their father. Sometimes things get complicated. That is for another answer.
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.
Which pair of chromosomes produces a male off-springs?
It depends which species you are. There is the XY system (which mammals use) where it is the presence of the Y chromosome that induces male development. The Y chromosome contains genes like Sry that initiate the male developmental program. Male mammals have an X and a Y chromosome, female mammals have two X chromosomes. However, for other species, like birds, use the so-called ZW sex chromosome system where it is actually the absence of the W chromosome that permits male development - male birds have two Z chromosomes and female birds have a W and a Z chromosome. And then there's the X0 system, which many insects use, where two copies of an X chromosome results in a female but a single copy of an X chromosome results in a male.
What is the gene that determines the sex of an offspring?
With people, girls have XX and guys have XY chromosomes.----------------------------------------------------------------------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 incubatedWhile 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.
