* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Mitosis/Meiosis Modeling Lab Analysis Questions – Answer Key
Human genetic variation wikipedia , lookup
Genome evolution wikipedia , lookup
Genomic imprinting wikipedia , lookup
Point mutation wikipedia , lookup
Genetic testing wikipedia , lookup
Epigenetics of human development wikipedia , lookup
Public health genomics wikipedia , lookup
Gene expression programming wikipedia , lookup
Y chromosome wikipedia , lookup
Site-specific recombinase technology wikipedia , lookup
Polycomb Group Proteins and Cancer wikipedia , lookup
Biology and consumer behaviour wikipedia , lookup
Hybrid (biology) wikipedia , lookup
Vectors in gene therapy wikipedia , lookup
Artificial gene synthesis wikipedia , lookup
X-inactivation wikipedia , lookup
Genetic engineering wikipedia , lookup
Designer baby wikipedia , lookup
Genome (book) wikipedia , lookup
History of genetic engineering wikipedia , lookup
Microevolution wikipedia , lookup
Mitosis/Meiosis Modeling Lab Analysis Questions – Answer Key Mitosis Modeling If a cell contains a set of duplicated chromosomes, does it contain any more genetic information than the cell before the chromosomes were duplicated? No. There is twice the amount of genetic material but no additional different genetic information. What is the significance of the fact that the chromosomes condense before they are moved? It allows the condensed, distinct chromosomes to be moved, aligned on the metaphase plate, and divided properly into 2 daughter cells. How are the chromosome copies, called sister chromatids, separated from each other? Cohesion proteins in the centromere are broken down and then the mitotic spindle fibers pull the two sister chromatids (now individual chromosomes) to the two separate poles. Meiosis Modeling How does the process increase genetic diversity? Crossing over generates recombinant chromosomes with new gene allele combinations Independent assortment creates essentially unique gametes How does the distance between two genes or a gene and a centromere affect crossover frequencies? The further genes are apart from each other, the more likely that a crossing over event will occur between them. When is the DNA replicated during meiosis? During S phase of Interphase – prior to Meiosis I How does Independent Assortment relate to meiosis? When the homologous pairs of chromosomes line up on the metaphase plate during Meiosis I, they do so independently of other pairs. How can you calculate the possible number of different kinds of gametes? Because of independent assortment, the number of different gametes possible is 2n, where n=the number of homologous pairs. In humans it is 223 possible combinations. How are mitosis & meiosis fundamentally different? Mitosis = one cell division cycle which produces two genetically identical diploid (2N) daughter cells Meiosis = two rounds of cell division which produces four genetically unique haploid (N) daughter cells called gametes