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sex chromosomes
Colten Gottlieb
Wiki User
∙ 12y agoThe 23rd chromosome is the sex chromosome. It is either an X or Y (strictly male) chromosome. When the sperm and egg cells fuse, they combine into 46 chromosomes with either two X chromosomes or an XY pairing. If it is 2 X chromosomes, the zygote is a female. If it an XY pairing, the zygote is a male.
Wiki User
∙ 14y agoThe 23rd pair is called the sex chromosomes.
There are 22 pairs of somatic chromosomes also known as autosomes
Wiki User
∙ 14y agosex chromosomes.
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How many pair of sex chromosomes does a human cell have?
Humans have one pair of sex chromosomes. They are called X and Y. The two determine what sex a person will be. Males have X + Y and females have X + X. There are some genes that are called sex linked genes found on these. The Y chromosome is very small and contains mainly the genes that make a person a male. There are few other genes on the Y.
How many chromatids are involved in crossing over of a homologous pair of chromosomes?
four two in each chromosome
What pairs of human chromosomes are autosomes?
Autosomes are the chromosomes which do not determine the sex of the offspring. for example, in humans, there are 22 pairs of autosomes, and one pair of sex chromosomes. Autosomes are chromosomes 1-22, and the sex chromosomes are chromosome 23.
The exceptions to the rule that every chromosome is part if a homologous pair are the?
The exceptions to the rule that every chromosome is part of a homologous pair are the gametes. Gametes are eggs and sperm, and each cell has only 23 chromosomes, which form pairs in the zygote after fertilization.
When will homozygous gene be expressed?
A cell can be described as being homozygous for a particular gene when there are identical genes on a pair of chromosomes (humans have 23 pairs). Under these conditions, we would see the expression of the gene under the homozygous condition. If the cell had a heterozygous condition, then there would not be identical genes found in the chromosome pair.
In humans what are the chromosome pairs 1 through 22 called?
Chromosome pair 23 in humans is the pair of sex chromosomes. In females, both sex chromosomes are the X sex chromosome, and in human males one sex chromosome is the X and the other is the Y chromosome.
What happened to the 24th chromosome pair present in other Primates when our ancestors became Human like as Humans have only 23 chromosome pairs?
Many scientists think the 24th chromosome fused together and that is why humans have 23.
How many pairs of chromosome's do humans have?
There are 23 pairs of chromosomes in the cell, or 46 total. 1 pair of them are sex chromosomes and the rest are called autosomes. There are 50-75 trillion cells in the human body. That means there are about 1,550,000,000,000,000- 1,725,000,000,000,000 pairs of chromosomes in the human body. The sex chromosomes in human, denoted X and Y, are only truly a pair in females (XX). So some people consider humans to all have 22 pairs chromosomes and 2 sex chromosomes.
What chromosome pair is not given a number?
pair 23 is not given a number.
Chromosome pair 23?
Human cells have 23 pairs of chromosomes. One pair of sex chromosomes, and 22 pairs of autosomes.See en.wikipedia.org/wiki/Chromosome
What chromosomes do human have 22 of?
The chromosomes number1- 22 is called autosomes and pair number 23 is called as sex chromosome.
How many of your chromosomes are sex chromosomes?
Out of 23 chromosome pairs one is the 'sex-linked' chromosome pair. The Answer is 1-out-of-23.
What percent of a parents genes does an egg or sperm cell have?
Humans have 23 pairs of chromosomes. A pair is made up of one chromosome from the egg, and one chromosome from the sperm. That makes it 50-50%.
How many chromosome s do humans have?
23
What chromosome do women carry?
All organisms carry a set number of pairs of chromosomes, in humans it is 23 pairs. Of these chromosomes one pair controls the sex of the human. The sex chromosomes are called the X and Y chromosome. Females have XX pairing and Males XY.
How many matching chromosome pairs do humans have?
23
Which chromosome represent a female?
A human has 46 chromosomes (23 pairs). One chromosome from each pair comes from the mother, and one chromosome from each pair comes from the father. One of the 23 pairs determines your sex. The sex chromosomes are called X and Y.For a child to be female, she must inherit an X chromosome from each parent (XX).For a child to be male, he must inherit an X chromosome from his mother and a Y chromosome from his father (XY).
