14 minute read
Unit 4 - Inheritance and Traits
Activity 4.1
Inherited Traits in Animals 1. List some traits the young animals inherited from their parents. (a) (b) a) (b) education nrents. s.
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(c)
(d) (d)
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2. Use the word ‘traits’ to explain why offspring look similar to their parents. Reg Use the word ‘traits’ e the word ‘tra their parents. R
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Activity 4.2
(a) (b) Inherited Traits in Plants 1. List some traits the young plants inherited from their parents. (a) (b) education nnts.
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2. (a) Circle the seedling that belongs to the parent plant. parent plant education nt plant t (b) How could you tell which seedling came from the parent plant?
Reg How could you te could yoR
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Activity 4.3
1. Use the chart to list ways in which the offspring are similar and how they are different. (a) (b) Similarities Differences Inheritance and Variationeducation r and how they d how they caeduc cedu e ffere n
Similarities Differences
Reg Reg g Similaritie
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(c)
Similarities Differences (d) Explain why the young organisms do not look identical to each other. gal gExplain wh ain why the younRe R du edu ed 79
2. (a) Draw a picture of what the offspring of the parent cats might look like. Give the offspring traits from both parents.tion mother mother father (b) List the traits the offspring inherited from each parent. Inherited Traits Mother FatherRegal al al aits the offspring inh he offsprin gaeg Regag R ther ucedu ufathe fth
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3. Observe the characteristics of the alien parents.
Draw three of the aliens’ offspring. Show how they have inherited traits from their parents. Show some variation in traits among the siblings.
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Offspring 1: Offspring 1: Offspring 2: Regal R g ga a al l gal galedu spring. Show how g. Show ho ome variation in e variation in ed e fspring Offspring 3: Offspring 3:
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Activity 4.4
What Are Your Inherited Traits? 1. Use the chart to list some of your inherited traits. Indicate which parent you inherited the trait from. Add some other inherited traits at the bottom of the chart. My Inherited Traits Trait Trait Description Inherited From (Mom/Dad/Both) Hair color Eye color Height Nose shape Mouth shape Ear shape Regal l al a gaeg gRe R pe education nwhich parent ch parent aits at the bottom at the bottio atio ioat cat caude Inherited (Mom/D
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2. (a) Paste a photograph or draw a picture of yourself and your siblings. Use the chart to list some similarities and differences in your traits. Similarities Differences (b) Explain why you don’t have identical traits as your siblings.Regegal egExplain wh ain why you do y yR ducation our tra ed d 83
Activity 4.5
Physical Traits for Survival 1. List and describe the physical traits of the organisms that help them to survive in their environment. (a) (b) R Regal education nhelp them the dueducatio e 84
(c)
2. The grasshoppers below are from the same parents. Describe how their variation in traits could help one of the grasshoppers survive. p g ppduc m the same par e of the grassho f the grassho g ationca c Rega gaegRe R
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Activity 4.6
Identifying Types of Traits Trait Physical or Behavioral Chelsea has blonde hair. A kangaroo seeks shade when it’s hot. A cat can see well at night. A bear eats berries in the spring. Bears have sharp claws and large teeth. A meerkat seeks shelter when it senses danger. Polar bears have thick fur. A duck has webbed feet. Ducklings follow their mother. Antarctic whales migrate north during winter. 1. Indicate if the trait is physical or behavioral. Regal lagRe R s Polar bears have t r bears hav A duck has we A duck has Ducklings fo Antarctic wha Antarctic education n ion oni ioati atcaucde Physical o Behavi s hot. ight. n the spring. claws and large s and large when it when it
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Trait Inherited or Learned Halle can play the piano. Riley has red hair. A spider spins a web. Sophie can do cartwheels. A bird can build a nest. A tiger is good at hunting prey. A bird sings a song to attract a mate. A gazelle can run fast. A gazelle flees when it senses danger. A pet cat comes to its food bowl for dinner. Chimpanzees use sticks to get termites from mounds. 2. Indicate if the trait is inherited or learned. Remember that instincts are inherited behavioral traits. Reg egRe R gal al ga gs a so gs a A gazelle can run A gazelle can A gazelle flees whe azelle flees A pet cat comes pet cat comes Chimpanzees us Chimpanzee ed e education on no tio atio atcud herited or earne heels. s. ld a nest. nest. od at hunting pr at hunting pr o attr attr
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Activity 4.7
Environmental Traits
1. Use the photographs as evidence to support an explanation that traits can be influenced by the environment. (a) (b) R Regal aledued on ion that traits hat traits n ucati 88
(c)
(d)
ducation ca catio du Reegga
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Activity 4.8
Inheritance, Variation and Survival Watch the video ‘Inheritance and Traits’ to use evidence to construct an explanation about each claim. Claim: Claim: Inherited traits are passed from parents to offspring, resulting in the offspring sharing characteristics with its parents. offspring sharing characteristics with its parents. Evidence and Explanation: Evidence and Explanation: Claim: Claim: education nonstruct truc cu dued ng, resulting in th resulting in t ng, resulting in thesulting in t Organisms inherit traits that can help them survive in their environment. raits that can he s that can aits that can h that can Evidence and Explanation:
g egRe R xplanation: tion: planation:
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Claim: Claim: Plants have traits inherited from parents and that variation of these these se these se traits exists in a group of similar plants. traits exists in a group of similar plants. Evidence and Explanation: Evidence and Explanation: Claim: Claim: Animals have traits inherited from parents and that variation of these traits exists in a group of similar animals. Evidence and Explanation:
du tiatcauc from parents om parent from parent of s of o animals animal
anation: on:ation: g egRe R
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Claim: Claim: Variations in the characteristics among individuals of the same kind may kind may ma kind may provide advantages for survival by hiding from predators. provide advantages for survival by hiding from predators.
Claim: Claim: du tiatcauc Variations in the characteristics among individuals of the same kind may ics among ind among in s among in provide advantages for finding a mate. findi fin find mate. mate ate. e
Evidence and Explanation: R ga g egRe nation: on:nati n:
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Activity 4.9
Use your textbook to help you fill in the blanks. 1. The process by which are passed from parents to offspring is called . 2. Differences in traits between offspring is called . 3. Variation of traits of the same organism can result in some individuals having a better chance of than others. 4. are behavioral traits offspring inherit from their parents. 5. Newly-acquired skills that are inherited are called traits. 6. traits are influenced by the surroundings of an organism. 7. The process by which the best suited organisms survive and pass on their traits is called . Inheritance and Traits – Comprehension Regal a traits are in traits a m. ocess by which the b ss by which the ts is called alled e education sed from parent from parent ed am can result in s n result in u t ehavioral traits o ioral traits re inherite e inherite n 93
Review
Inheritance and Traits 1. Look at the photograph of the parent cat and its offspring. (a) List three traits the offspring have inherited from their parents. (b) Why is there variation between the offspring? 2. Provide an example where variation within a group of organisms of the same kind may help an individual survive. Regal ation al ga gan example whe me kind may hR education n ited fr dued e 94
3. Complete the table by providing examples of different traits.
4. List two environmental factors that could influence the height of trees growing in a forest.
5. Halle fed her pet cat Kimba too many snacks. Kimba became overweight.
Will Kimba’s offspring also be overweight? Explain your answer.
Type of Trait Examples
Physical Inherited Trait
Instinct
Learned Trait
Environmental Trait
Regal tal a ga pet cat Kimb a’s offspring alsRe R e thatc educatio tioatcaucdu d on n 95
