Yy sex chromosomes

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Sex chromosome aneuploidy is the most common numerical chromosomal abnormality in humans at birth and a substantial portion of these abnormalities involve paternal chromosomes. An efficient method is presented for using air-dried smears of human semen to detect the number of X and Y chromosomes in sperm chromatin using two-chromosome fluorescence in situ hybridization. Air-dried semen smears were pre-treated with dithiothreitol and 3,4-diiodosalicylate salt to decondense the sperm chromatin and then were hybridized with repetitive sequence DNA probes that had been generated by PCR and differentially labeled.

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Sex chromosomeeither of a pair of chromosomes that determine whether an individual is male or female. The sex chromosomes of human beings and other mammals are designated by scientists as X and Y. In humans the sex chromosomes comprise one pair of the total of 23 pairs of chromosomes.

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Sex determination mechanisms in teleost fish broadly differ from mammals and birds, with sex chromosomes that are far less differentiated and recombination often occurring along the length of the X and Y chromosomes, posing major challenges for the identification of specific sex determination genes. Here, we take an innovative approach of comparative genome analysis of the genomic sequences of the X chromosome and newly sequenced Y chromosome in the channel catfish. Using a YY channel catfish as the sequencing template, we generated, assembled, and annotated the Y genome sequence of channel catfish.

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XYY syndrome is a genetic condition in which a male has an extra Y chromosome. The condition is generally not inherited from a person's parents but rather occurs as a result of a random event during sperm cell development. Treatment may include speech therapy or extra help with schoolwork.

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XYY syndrome is a rare chromosomal disorder that affects males. It is caused by the presence of an extra Y chromosome. Males normally have one X and one Y chromosome.

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Most people have 46 chromosomes in each cell. In males, this typically includes one X chromosome and one Y chromosome XY. XYY syndrome is a genetic condition that occurs when a male has an extra copy of the Y chromosome in each of their cells XYY.

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Screening Genomic Scanning niloticus sex chromosome-specific markers. XX tested on female Nile tilapia are genetically. The invention belongs to the technical field of genetic engineering, in particular to specific molecular markers of sex chromosomes of Tilapia nilotica, wherein the nucleotide sequences of specific molecular markers NtY1 and NtY2 of a Y chromosome are respectively shown in SEQID No.

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Stronger focus on nutrition within health services could save 3. Humans are born with 46 chromosomes in 23 pairs. Most women are 46XX and most men are 46XY.

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