Mrs. Baxter and Mrs. Herndon 5th Life Science DNA Mrs. Baxter and Mrs. Herndon 5th Life Science

1. Genetics is the study of genes, heredity, and genetic  variation in living organisms.  https://genetics of a four leaf clover

https://brain pop DNA/ 2. DNA - carries the genetic information for a cell and is a set of instructions that tells the cell what to do or be. 3. Chromosome – a single long molecule of DNA (x shape).

4. Gene – a part of the chromosome that contains DNA

Traits: http://online traits video/

Genetic traits

5. Inherited trait – a characteristic passed from parents to their offspring. 6. Dominate trait – a strong trait that appears even if the organisms has only one factor. 7. Recessive trait – a trait that appears only if an organism has two factors. 8. Hidden trait – a trait that an organism carries, but is not expressed.

H t HH Ht tt Ht H - black t - spotted HH= dominant Ht = dominant tt = recessive H t HH Ht tt Ht

DNA (Deoxyribonucleic Acid) DNA BrainPop Is the chemical code that gives you your inherited traits like hair color, eye color, height, handedness and tongue rolling

Famous DNA Scientists Rosalind Franklin: an English scientist who made the first x-ray images of DNA DNA X-ray

Maurice Wilkins gives Franklin’s x-rays to Watson and Crick discovery/history 1950’s -1960’s Maurice Wilkins gives Franklin’s x-rays to Watson and Crick Francis Crick and James Watson make a model of DNA Maurice Wilkins

Franklin dies of cancer Watson and Crick Franklin dies of cancer Wilkins, Watson, and Crick share a Nobel Prize for the DNA model

9. Genetic mutations: occur when there are changes in a cell’s DNA. Albinism – loss of pigmentation in the skin, hair, and eyes

https://brainpop genetic mutations/

Obj. What is an Adaptation? 10. Adaptations: inherited traits that help living things meet basic needs and survive in their environments 11. migration: an inherited trait that causes some animals to move to different places in order to survive. 12. extinction: the death of all organisms of a species. BrainPop Page 162-163 in science textbook

2. Behavioral 3. Life processes 3 Types of Adaptations: 1. Physical 2. Behavioral 3. Life processes Study Jams – Animal Adaptations

StudyJams video

What Other Factors Affect Characteristics? Pages 168-176 in textbook

Vocabulary: instinct: a behavior that an organism inherits Learned behavior: a behavior that an animal acquires through experiences Environment: all the living and nonliving things that surround and affect an organism

Instincts Brainpop In your journal, answer the question: What effect do instincts have on an animal’s survival? Page 172-173

What are Learned Behaviors? Answer in your journal: How are most animal behaviors learned? Page 174-175

Environmental Influences Page 176 All living things have needs: food, water, space, and shelter. * Changes in the environment force animals to change their behavior. * Sometimes, the environment causes a physical change in a species over time.