Wilburworld of Science

Unit 7:  Meiosis & Genetics
Objective:  Use a Punnett Square to determine the probabilities for genotype and phenotype combinations in monohybrid crosses.  Std. 3.6
Objective:  Describe how Mendel's laws of segregation and independent assorment can be observed thorugh patterns of inheritance (ex: dihybrid crosses).    Std. 3.5
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Objective:  Describe how the process of meiosis results in the formation of haploid cells.  Explain the importance of this process in sexual reproduction, and how gametes form diploid zygotes in the process of fertilization.    Std. 2.7

There are two types of nuclear division in eukaryotes. Mitosis occurs in all of our body cells and results in cells identical to the pre-existing cells, having 46 chromosomes. Only sex cells (eggs/sperms) go through meiosis. This process results in gametes containing half the original number of chromosomes.
Gregor Mendel is known as the father of genetics - the field of biology devoted to understanding how traits (such as eye color, height and diseases) are passed from parents to offspring. Punnet squares are used to predict the probabilities of an individual having a certain trait. 
Objective:  Distinguish among observed inheritance patterns caused by several types of genetic traits (dominant, recessive, codominant, sex-linked, polygenic, incomplete dominance, multiple alleles.  Std. 3.4

Geneticists analyze genetic data from families to track the inheritance of specific human genes. As scientists learn more about this field about biology, more diseases are being detected and treated.