How many chromosomes in a human cell? explain briefly. Why is it so important for sex cells to undergo meiosis prior to fertilization? What is cell division and why is it important? Discuss the importance of meiosis. What are chromosomes explain with examples?
are made up of chromatin. Chromatin made up of the threads of DNA forms the structure of chromosomes. The DNA gets condensed to form chromosomes. Genes are the segments of DNA. The code for proteins. This means chromosomes are made up of DNA which contains many genes in the...
What are examples of asexual reproduction? Why meiosis is necessary for gametogenesis? What happens if one of the chromosomes doesn't separate fully during meiosis II? Give an example of a common disorder caused by this phenomenon. What are the symptoms of this disorder?
Polysomy isa condition where there is more than one copy of the chromosome relative to the normal. Trisomy (2N+1) and tetrasomy (2N+2) are examples of polysomy. Trisomy is a polysomy characterized by an extra copy of a particular chromosome. What does Polysomy mean? [ pŏl′ē-sō′mē...
Examples of EnzymesThere are various examples of enzymes. Some of them are as follows: Amylase Amylase is an enzyme that helps turn starches into sugars. It is present in human saliva and certain other mammals. It helps to digest foods, such as potatoes and rice, that contain large amounts...
Alleles are the versions of the gene that the organism receives from its parents. Each organism will get one allele from each parent. Each parent contributes half of the chromosomes for the offspring, and their chromosomes match up to provide the two alleles needed for each gene. There are...
of particularly interesting examples, and it is also possible to find pictures in scientific papers. One consequence of research in the lab on gynandromorphs has been a deeper understanding of the function of sex chromosomes in the development of the brains and reproductive tracts in some ...
Eye colour and colour perception are excellent examples to use when teaching genetics as they encompass not simply the basic Mendelian genetics of dominant, recessive and X-linked disorders, but also many of the new concepts such as non-allelic diseases, polygenic disease, phenocopies, genome-wide...
Sex-Linked Traits. traits that are carried on sex chromosomes. mainly present on the X chromosome; also called x-linked traits. ex: blood clotting factors
Most cases of aneuploidy result in miscarriage. However, some aneuploidies can result in a live birth. The most common aneuploidy that infants can survive is Down syndrome, Turner syndrome, and Klinefelter syndrome. Examples of aneuploid chromosomes include: Trisomy 21: Trisomy 21 (Down syndrome) ...