Biology Unit 7

Big Idea:

The process of meiosis can lead to changes in organisms through the processes of Mendelian genetics.

Student Expectations:

Priority TEKS

B.6E identify and illustrate changes in DNA and evaluate the significance of these changes;

B.6F predict possible outcomes of various genetic combinations such as monohybrid crosses, dihybrid crosses , and non-Mendelian inheritance

B.6G recognize the significance of meiosis to sexual reproduction.

Focus TEKS

B.3F research and describe the history of biology and contributions of scientists.

B.6A identify components of DNA, identify how information for specifying the traits of an organism is carried in the DNA, and examine scientific explanations for the origin of DNA

B.6B recognize that components that make up the genetic code are common to all organisms;

B.6D recognize that gene expression is a regulated process;

Ongoing TEKS

7.14A Define heredity as the passage of genetic instructions from one generation to the next generation

7.14B Compare the results of uniform or diverse offspring from sexual reproduction or asexual reproduction

7.14C Recognize that inherited traits of individuals are governed in the genetic material found in the genes within chromosomes in the nucleus

B.2F collect and organize qualitative and quantitative data and make measurements with accuracy and precision using tools such as data-collecting probes, standard laboratory glassware, microscopes, various prepared slides, stereoscopes, metric rulers, balances, gel electrophoresis apparatuses, micropipettes, hand lenses, Celsius thermometers, hot plates, lab notebooks or journals, timing devices, Petri dishes, lab incubators, dissection equipment, meter sticks, and models, diagrams, or samples of biological specimens or structures

B.2G analyze, evaluate, make inferences, and predict trends from data

B.2H communicate valid conclusions supported by the data through methods such as lab reports, labeled drawings, graphic organizers, journals, summaries, oral reports, and technology-based reports

B.3A analyze, evaluate, and critique scientific explanations by using empirical evidence, logical reasoning, and experimental and observational testing, so as to encourage critical thinking by the student

B.3D evaluate the impact of scientific research on society and the environment

B.3E evaluate models according to their limitations in representing biological objects or events

B.3F research and describe the history of biology and contributions of scientists

Student Learning Targets:

• I will describe the stages of meiosis.
• I will recognize the stages of meiosis through microscopic analysis.
• I will understand the difference between traits, genes, and alleles.
• I will use Punnett squares to predict possible genetic crosses.
• I will distinguish between genotypic and phenotypic ratios.
• I will describe the exceptions to traditional Mendelian genetics.

Essential Questions:

• How do genes and chromosomes relate to heredity?
• In what ways are scientific technology and techniques used to study genomics?
• What factors influence inheritance patterns and expression of genes?
• How can the probability of offspring inheritance be calculated?
• What role does meiosis play in the probability of offspring inheritance?

Extra Information:

Adopted Textbook: Biology, Houghton Mifflin Harcourt, Holt McDougal

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