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- ... altered gene for an autosomal recessive disorder (carriers) have a 25 percent chance with each pregnancy of ... and the chance that a child will not have the disorder and will not be a carrier ...
- ... less is known about the Denisovans because scientists have uncovered fewer fossils of these ancient people.) The ... interbred). As a result, many people living today have a small amount of genetic material from these ...
- ... even within the same family. Genetic variations can have large or small effects on the likelihood of ... genes, such as BARD1 and BRIP1, appear to have a much smaller impact on a person's ...
- ... sex chromosomes, differ between males and females. Females have two copies of the X chromosome , while males have one X and one Y chromosome . The 22 ...
- ... by blood (for example, cousins) who plan to have children together. (A child whose parents are related ...
- ... s fingerprints are unique, which is why they have long been used as a way to identify ... from everyone else’s. Even identical twins, who have the same DNA, have different fingerprints. Few genes ...
- ... disorder in which some cells in the body have an abnormal number of chromosomes instead of the ... a situation known as aneuploidy. Most commonly, cells have an extra chromosome, which is called trisomy, or ...
- ... abnormally positioned internal organs, and the inability to have children (infertility). The signs and symptoms of this ... cause infection. People with primary ciliary dyskinesia also have year-round nasal congestion and a chronic cough. ...
- ... is a condition in which all affected individuals have intellectual disability, speech and language problems, and a distinct facial appearance. Many affected individuals have additional neurological, behavioral, and health problems.In PACS1 ...
- ... aphasia spectrum is a group of conditions that have overlapping signs and symptoms. A key feature of ... this spectrum develop recurrent seizures (epilepsy), and some have mild to severe intellectual disability. The conditions in ...