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What chromosome has to be present for a mother to have a male child?
Y chromosome
Defect on chromosome 21 where a third chromosome is present what is this defect called?
This is trisomy 21 i.e. Downs syndrome
What is a X chromosome?
If an individual has the chromosome series XY, that individual would be a male. The Y chromosome is passed down from the father and the X is passed from the mother. The X chromosome contains all hereditary factors while the Y chromosome doesn't contain much genetical information at all, except the fact if Y chromosome is present that individual will be a male. This is all only true for Humans. Dosophilla (fruit flies) have different chromosomal expressions.
What is Unit of inheritance present on the chromosome is called?
The unit of heredity found on a chromosome is called a gene.
How many chromosome are present in the antherozoid?
It depends upon the species to which antherozoid belongs .
What chromosome has to be present for a mother to have a male child?
Y chromosome
Sox 9 gene is present on which chromosome?
17
Defect on chromosome 21 where a third chromosome is present what is this defect called?
This is trisomy 21 i.e. Downs syndrome
Why is the y chromosome useful for tracing ancestry?
The y-chromosome is only present in males. Men will a y-chromosome identical to that of their father, and his father, and his father, etc.
What is a X chromosome?
If an individual has the chromosome series XY, that individual would be a male. The Y chromosome is passed down from the father and the X is passed from the mother. The X chromosome contains all hereditary factors while the Y chromosome doesn't contain much genetical information at all, except the fact if Y chromosome is present that individual will be a male. This is all only true for Humans. Dosophilla (fruit flies) have different chromosomal expressions.
How many chromotids are present in a chromosome at the beginning of mitosis?
2
Is the color blindness gene also present on the Y chromosome?
No - the colour blindness gene is only found on the X chromosome.
What sex chromosome is present in all humans?
There are two sex chromosomes: the X chromosome and the Y chromosome. During fertilization, the mother always gives an X chromosome and the father gives either another X chromosome or a Y chromosome. Therefore, all humans have at least one X chromosome.
How does fertilization restores the diploid number of chromosome in an orgaism with a haploid chromosome of 8 how many chromosomes are present in the spermatogonium?
it multiplies itself
What is trisomy syndrome?
In a trisomy syndrome, an extra chromosome is present so that the individual has three of a particular chromosome instead of the normal pair.
What is Unit of inheritance present on the chromosome is called?
The unit of heredity found on a chromosome is called a gene.
How many pairs of chromosome is present in animal cell?
23 pairs
