Essays Tagged: "sex chromosomes"
The Fragile X syndrome and Duchenne muscular dystrophy (DMD) disease comparation
. Human cells have 46 chromosomes (fig 2 below) - 22 pairs of autosomes chromosomes 1 to 22 and two sex chromosomes X and y or X and X depending gender (sex-linked). Within these chromosomes are rough ... enes that controls and construct the organs in the body.There are over approximately 250 recognized sex-linked diseases, affecting every organ system. Of these, 95% affect males as it reflects the pre ...
Subjects: Science Essays > Biology
Determining a childs sex
Determining Sex:What determines a child's sex? Usually it is the sex chromosomes in which two X chromosomes in t ... from the embryo's yolk sac to the genital ridge. These germ cells are integrated into the primitive sex chord, which are fingerlike projections that have formed over the previous week.Male development ... e, the embryo will develop into a female via mechanisms that are not fully understood.The primitive sex cords, now called testes cords, have grown extending into the surrounding tissue. The cords now ...
Subjects: Science Essays
Chromosome 18 Research Paper
CTION:Chromosomes are fundamental to all life. There are 22 numbered pairs of chromosomes, plus two sex chromosomes. The sex chromosomes in females are the two X chromosomes and in male they are an X ... 0.74 ± 0.11, at the Australian Genome Research Facility (AGRF) (Ewen ). The mean ± SD sex-averaged distance between adjacent markers is 8.6 ± 6.5 cM (range 0 34 cM). The genomewid ...
Subjects: Science Essays > Chemistry
Alligators and Crocodiles: Comparison and Contrast
the bottom of the mouth, preventing the tongue from moving. One striking similarity is the lack of sex chromosomes; the youngs' sex is determined by the temperature at which the eggs are incubated; m ...
Subjects: Science Essays > Biology
Study Notes on Cytogenetics
of a person that's photographed at metaphase and arranged in orderautosomes- chromosomes 1-22; not sex chromosomessex chromosomes- chromosomes that determine the sex; X and Y chromosomestranslocation ... , making a triploid zygotetriploidy- condition in which there are three copies of all autosomes and sex chromosomestetraploidy- condition in which there are four copies of all autosomes and sex chromo ...
Subjects: Science Essays > Biology
Chromosomes
s, one pair is different, one chromosome is shorter than its partner. These two chromosomes are the sex chromosomes.In females both the sex chromosomes are the same length.We use an X to represent the ... e two Xs or the X and Y are separated from each other during meiosis - the cell divisions that form sex cells or gametes. All healthy eggs produced by a human ovary have an X chromosome. However, with ...
Subjects: Science Essays
List of Genetic Disorders
s a condition caused by a chromosome nondisjunction in males; affected individuals have a pair of X sex chromosomes instead of just one. It causes the male to be infertile.Patau syndrome, also known a ... of small children.Turner syndrome is a human genetic abnormality, caused by a nondisjunction in the sex chromosomes that occurs in females. Instead of the normal XX sex chromosomes, only one X chromos ...
Subjects: Science Essays > Genetics & Genome Projects
Testing the transfer of alleles in Drosophila
oss which a punnet square can be used to identify the genotype of the cross. The second method is a sex linked cross which identifies the phenotypic expression of an allele that is related to the gend ... notypic expression of an allele that is related to the gender of the individual and is found on the sex chromosomes. This mode of inheritance is in contrast to the inheritance of traits on autosomal c ...
Subjects: Science Essays > Biology
Genetic Disorders
ne disorders known as X-linked disorders involves genes located on the X chromosome, one of the two sex chromosomes. An example of an X-linked disorder is hemophilia. People with hemophilia usually la ...
Subjects: Science Essays > Biology