Year 10 Science · Unit 1 · Lesson 20

Unit Synthesis and Depth Study Preparation

Foundation Worksheet

Name
Date
Class

Learning Goals

Warm Up

Fill the gap

Choose the correct word from the word bank to complete each sentence. Use each word once.

homologous CRISPR allopatric speciation pedigree transitional fossil natural selection antibiotic resistance molecular clock germline meiosis

Genetic variation in sexually reproducing organisms arises because (cell division for reproduction) produces genetically unique gametes. A family diagram is used to trace the inheritance of a genetic condition across generations. The gene-editing technology allows scientists to cut and replace specific DNA sequences, raising significant ethical debates. Only mutations in the (sex cells) can be passed to offspring; somatic mutations affect only the individual. The human arm, bat wing, and whale flipper are structures, suggesting common ancestry. Tiktaalik is a classic example of a showing features of both fish and tetrapods. Scientists use a to estimate when two species last shared a common ancestor. The process by which a physical barrier separates a population and new species eventually form is called . The evolution of bacteria that survive drug treatment is an example of driven by .

Your Turn

Sort it!

Write each concept from the pool into the correct theme box below.

Punnett square Homologous structures CRISPR Allopatric speciation DNA replication Transitional fossil Selective breeding Natural selection Dominant / recessive alleles DNA similarity (molecular evidence) GMO crops Reproductive isolation Mutation Biogeography DNA fingerprinting Antibiotic resistance

DNA & Inheritance

Genetic Technologies

Evidence for Evolution

Natural Selection & Speciation

Show What You Know

1. What is the connection between mutation (from DNA & Inheritance) and natural selection (from Natural Selection & Speciation)? Explain how mutations provide the raw material for evolution.

Recall 2 marks

2. Give one example of a genetic technology from this unit and explain one ethical issue associated with it.

Recall 2 marks

Wrap Up

In one sentence, what was the main idea of this lesson?

HSCScience · Year 10 Science · Unit 1 · Lesson 20 · Foundation Worksheet