AdaptationsStandard LS3E

Adaptations

• Ecosystem A has extreme temperature changes from day to night.

• Kalarkey (made up organism) has sharp claws and teeth.

• Are sharp claws and teeth an adaptation to this environment? Why or why not?

AdaptationsThe kangaroo rat lives in the desert ecosystem.

What is a structural and behavioral adaptation it has to help it survive better? Make sure you connect the adaptations with an environmental pressure.

Adaptations• 3 bird beak types within a species of finches:

Probe beak

Crusher beak

Prying beak

Within the same finch species living on an island, there is a diversity of beak types. Their food supply ranged from shellfish, nuts, and insects. One year, there was a wildfire that razed much of the forest down.The following is a data table of the population numbers of the finches:

Beak type 2001 2002 (fire) 2003 2004 2005

Probe 211 225 242 288 301

Crusher 320 170 142 108 56

Prying 179 160 157 169 182

1. What adaptations does this finch population have?2. What do you expect to happen after more generations have passed to the beak types observed in the finch population? Why?3. How did this diversity in the beaks happen in the first place?

Sexual/Asexual Reproduction

Standard: LS3C

S/A Reproduction

• Why would offspring from sexually reproducing parents be more likely to survive changes in an environment than offspring from asexually reproducing parents?

S/A Reproduction

• How are offspring from asexually reproducing parents different from offspring from sexually reproducing parents?

S/A Reproduction

• What are some examples of asexually reproducing organisms?

S/A Reproduction

• A full grown daughter plant from my spider plant is slightly smaller and has less leaves than the mother plant.

• How can this be when spider plants reproduce asexually and have identical genes?

Who’s Your Larkey Daddy?

A review on Genetics: LS3D

Situation 1

• Blue eyed Mom Larkey claims that baby Larkey, who has a Bb genotype for his brown eyes, was fathered by Mr. R. Larkey. Mr. R. Larkey denies all claims. When the DNA sequencing came back, it was found that Mr. R. Larkey’s genotype is bb.• Who is right? Provide evidence to support your answer.

Situation 2

• 3 male larkeys claim that Baby Larkey belongs to them. Mom Larkey refuses any comment.• Which male larkey is most likely the father?• Baby: HH (height)• Mom: Hh• Male 1: hh• Male 2: Hh• Male 3: HH

Situation 3

• Brown eyed Mom Larkey really wants to have a blue eyed baby. Her mom, soon to be grandma Larkey, has blue eyes, and grandpa is Bb for his eyes.• Dad Larkey also has Bb for his eyes. • What are the chances that this couple will have a blue eyed baby

Larkey?

Situation 4

• Mom Larkey was disappointed at the odds for having a blue eyed baby Larkey with current Dad, so she dumped him and is looking for someone who can give her better chances.• What kind of genotype should Mom Larkey be looking for in her new

Husband Larkey?

Situation 5

• Mom Larkey decided that even those odds weren’t good enough for her. She decided to use a scientific technique called invitro fertilization and implant a fertilized egg in her uterus.• What genes would the egg and the sperm have to have to ensure that

her new baby Larkey would have blue eyes?

Situation 6

• A. Larkey (AA = long legs)had been adopted and spent her whole life not knowing who her real parents were. She decided to try to find them based on her knowledge of DNA.• She narrowed down her search to 3 possible parent pairs:• Mom: AA Dad: aa• Momma: Aa Dadda: aa• Mommy: Aa Daddy AA• Who is the right parent pair? Why?

Situation 7

• Hemophilia runs in the Larkey family. • Grandma (HH) has it.• Grandpa (Hh) doesn’t have it.• Mom (their daughter – Hh) has it.• Dad (not their son – hh) doesn’t have it.• Son (Hh) has it.• Daughter (hh) doesn’t have it.• Another Son (Hh) has it.• Help this family figure out what is going on!

Situation 8

• You make up a situation about larkeys to present to your group!• Make sure you:• Follow the rules of sexual reproduction.• Follow the rules of dominance/recessiveness.