Philadelphia chromosome

Cri du chat Syndrome Cri du chat syndrome is an uncommon genetic condition that is caused by missing genetic material on chromosome 5. Specifically a part on the small arm (p) of chromosome 5 is absent. The disorder occurs in 1 in 20,000 to 50,000 live births according to the US National Library of Medicine. What causes this to happen is currently unknown. Cri du chat syndrome was first described in 1963 by French geneticist Jérôme Lejeune. He noticed that several of his patients…

processes and qualities allowing the cell cycle to operate effectively and efficiently. During the cell cycle, four stages occur known as G1 phase, S phase, G2 phase, & M phase. The G1 phase is where the cell is assigned to enter the process for chromosome duplication. DNA replication occurs in the S phase. The third phase, G2 phase, the process of mitosis triggering the alignment of the mitotic spindles. Mitosis and cytokinesis are two important functions that occur throughout the M phase. The…

For a century, scientists studied chromosomes by looking at them under a microscope. In order for chromosomes to be seen this way, they need to be stained. Once stained, the chromosomes look like strings with light and dark bands, and their picture can be taken. A picture, or chromosome map, of all 46 chromosomes is called a karyotype. The karyotype can help identify abnormalities in the structure or the number of chromosomes. To help identify chromosomes, the pairs have been numbered from 1 to…

the nucleus as chromatin, but during cell division the DNA stored as chromatin condense into chromosomes. -The DNA initially condenses into chromatin when it is wrapped around histone (a protein molecule) and then coiled. -Histone is positively charged (DNA is negatively charged) and is made from four main proteins. -Once DNA is wrapped into chromatin, it is further coiled and condensed to make chromosomes. -In…

Each year about four million babies are born around the world. Out of four million only three percent will be born with a genetic disorder and around one percent of the babies will be born with chromosomal abnormality. The reactions to these disorders vary from stares to happiness, resulting in the child feeling different or abnormal but it should not be a thing to frown upon. Ectodermal dysplasia is a group of syndromes that involve defects in the skin,hair, and nails. There are about more…

syndrome, is a severe pleiotropic autosomal recessive developmental disorder caused by dysfunction of primary cilia during early embryogenesis. In addition, it has discovered that there is more than one gene can cause the disease and which genes on chromosome 8, 11 and 17. And it is a rare disease and the different incidence of this disease around the world at a rate of 1 to 1…

(3.) The percentage of Allison’s egg cells that she produces during her lifetime that will carry the recessive allele and the X chromosome is seventy five percent. For the fact, twenty five percent of the cell will carry homozygous recessive allele and X chromosome, the other fifty percentage will carry heterozygous recessive allele and X chromosome. (4.) A. Twenty Five Percent B. No. C. (X)R (X)r (X)R (X)R(X)R - Female homozygous dominant (X)R(X)r - Female heterozygous…

Turner's syndrome is a rare condition that affects females. It results when a sex chromosome (X chromosome) is either missing or partially missing. Turner’s syndrome can cause a lot of different medical problems such as short height, puberty failure, heart defects, learning disabilities and social adjustment problems. It is sometimes diagnosed before birth, during infancy or during their early childhood. Occasionally the diagnosis is delayed until the teen or young adult years in those who have…

When sperm with no X chromosome unites with a normal egg to form an embryo, that embryo will have just one X chromosome rather than two. As the baby grows and the cells divide, the X chromosome will be missing from every cell of the baby's body. In some cases, both X chromosomes are present, but one is abnormal. It may be shaped differently or missing genetic material. The effects of the condition…

“People with autism spectrum disorder (ASD) demonstrate characteristics of impaired social interaction and communication abilities. These clients are unable to initiate conversations and fail to understand or observe nonverbal behaviors. Another identifier for someone with ASD is their use of repetitive and restrictive behaviors. A client with ASD will repeat the question being asked rather than answer it. The client will parrot or repeat one word or phrase that is spoken to them, also known as…