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TX PACT Life Science 7–12 (738) Practice Tests & Test Prep by Exam Edge - Topics



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Understanding what is on the TX PACT Life Science 7-12 exam is crucial step in preparing for the exam. You will need to have an understanding of the testing domain (topics covered) to be sure you are studying the correct information.

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There is no doubt that this is a strategic step in achieving certification and advancing your career.

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TX PACT Life Science Grades 7-12 Exam Blueprint

Understanding the exact breakdown of the TX PACT Life Science Grades 7-12 test will help you know what to expect and how to most effectively prepare. The TX PACT Life Science Grades 7-12 has 125 multiple-choice questions The exam will be broken down into the sections below:

TX PACT Life Science Grades 7-12 Exam Blueprint
Domain Name % Number of
Questions
Nature of Science 20% 25
Biochemistry and Cell Biology 13% 16
Genetics and Evolution 27% 34
Biological Unity and Diversity 20% 25
Ecology and Environment 20% 25

TX PACT Life Science Grades 7-12 - Exam Topics Sample Questions

A doctor is giving a lecture on autosomal recessive genes. What topic is not included?

Correct Answer:
hemophilia is not included.


the topic of hemophilia is not included in a lecture focusing on autosomal recessive genes. autosomal recessive disorders are caused by mutations in genes located on the autosomes, which are the numbered chromosomes that do not determine sex. examples of autosomal recessive disorders include cystic fibrosis, phenylketonuria (pku), and sickle cell disease. these conditions require that an individual inherit two copies of the mutated gene, one from each parent, to express the disorder.

hemophilia, however, does not fit into this category as it is a sex-linked disorder, specifically linked to the x chromosome. it predominantly affects males who only have one x chromosome. a male with the mutated gene on his x chromosome will display symptoms of hemophilia because he lacks a second x chromosome that could potentially carry a normal copy of the gene. females, having two x chromosomes, are typically carriers of the disorder unless they inherit two mutated copies, in which case they would also exhibit symptoms.

therefore, when discussing autosomal recessive genes and the disorders associated with them, hemophilia is not included because it is inherited differently and involves a different mechanism of genetic transmission. this distinction is crucial for understanding the genetic basis of different hereditary conditions and is an essential consideration in medical genetics education.