How to solve problems in genetics

In the study of genetics, much attention is given to problems whose solution must be found using the laws of inheritance of genes. Most of the natural Sciences, the task of genetics seems to be one of the most difficult things in biology. However, it is a simple algorithm.

You will need

• tutorial.

Instruction

1. Start, carefully read the task and write a brief, schematic manner, the condition using special characters. Mark, what are the genotypes of their parents, and how they correspond to the phenotype. Write down what out children in first and second generations.
2. Note which gene is dominant and which recessive, if it is in the condition. If the objective of this splitting, also specify it in the schematic entry. For simple problems in genetics sometimes a correct record the condition, to understand the decision task.
3. Proceed to the solution. Note again the incident crossing: the genotypes of the parents, the resulting gametes and the genotypes (or the expected genotypes) of children.
4. For the successful solution of the problem you need to understand which section it belongs: monohybrid, digibridge or polygyridae crossing, inheritance, sex-linked or a sign is inherited in the interaction of genes. To do this, count the splitting of the genotype or the phenotype observed in the offspring in the first generation. The condition can be specified the exact number of individuals with each genotype or phenotype, or the percentage of each genotype (phenotype) of the total. These data should lead to simple numbers.
5. Please note, does not vary if the offspring characteristics in relation to sex.
6. Each type of crossing characterized by its specific cleavage of the genotype and the phenotype. All these data are contained in the textbook, and you will be convenient to write these formulas on a separate sheet of paper and use them in solving problems.
7. Now that you have discovered fission, the principle of which is the transmission of hereditary traits in your task, you can read the genotypes and phenotypes of all individuals in the offspring and the genotypes and phenotypes of the parents involved in crossing.
8. Record the obtained data in response.