Aabout everything that happens in our genes
Which of the following does not occur in anaphase I but occurs in anaphase II? Anaphase-I is characterized by the segregation or disjunction of homologous chromosomes while sister chromatids remain associated at their centromeres. Whereas in anaphase-II, sister chromatids are separated by splitting centromere. What has to happen for anaphase to begin? Anaphase starts after …
How do medical issues and care affect people with Down syndrome? Which of the following is a difference between genotype and phenotype? The genotype is a set of genes in DNA responsible for unique trait or characteristics while the phenotype is the physical appearance or characteristic of an organism.…Difference between Genotype and Phenotype. Genotype Phenotype …
How many alleles are in a gene? An individual inherits two alleles for each gene, one from each parent. If the two alleles are the same, the individual is homozygous for that gene. Can humans have more than 2 alleles per gene? Although individual humans (and all diploid organisms) can only have two alleles for …
How are mitosis and meiosis are similar? Similarities between mitosis and meiosis: Both mitosis and meiosis are processes of cell division. They use the same steps for cell division, including prophase, metaphase, anaphase and telophase. … Also, mitosis produces 2 diploid cells, while meiosis produces 4 haploid cells. In what ways are mitosis and meiosis …
How many genes do we share with bacteria? The finding, one of the most surprising in the consortium’s report on the human genome this February, was that 223 of the 30,000 human genes appear to have been acquired directly from bacteria. Do humans share genes with bacteria? A genetic code, encoded into DNA usually runs …
What are homozygous genotypes? (HOH-moh-ZY-gus JEE-noh-tipe) The presence of two identical alleles at a particular gene locus. A homozygous genotype may include two normal alleles or two alleles that have the same variant. What is an example of a heterozygous genotype? Heterozygous means that an organism has two different alleles of a gene. For example, …
· Why is it important to produce haploid gametes? Gametes should be haploid for maintaining the chromosome number of the species. This is achieved by meiosis the reduction division in germ cells. Meiosis is reduction division that occurs only in germ cells where gametes are produced with half the chromosome number to that of the …
Why does telomere length decrease with age? Telomeres, nucleoprotein structures located at the ends of eukaryotic chromosomes, protect the end of the chromosome from degradation and end-to-end fusion [1]. With each somatic cell division, there is a gradual attrition of the telomere, resulting in telomere length shortening with increasing age [1]. Why do telomeres get …
Which parent is responsible for Down syndrome? To date, no behavioral activity of the parents or environmental factor is known to cause Down syndrome. After much research on these cell division errors, researchers know that: In the majority of cases, the extra copy of chromosome 21 comes from the mother in the egg. Who is …
Which part of mitosis is most confusing? One common point of confusion is the difference between chromosomes and chromatids during the mitosis phases. Chromosomes are long DNA strands that are packed into dense finger-like structures by proteins during mitosis. What is the most difficult phase of mitosis to identify? DNA is most difficult to visualize …