Genotypes, Phenotypes, and Punnetts Square

  • Due May 3, 2024 at 11:59pm
  • Points 46
  • Questions 6
  • Available after Apr 29, 2024 at 12am
  • Time Limit None
  • Allowed Attempts 5

Instructions

What I will be learning... I will be learning the difference between phenotype and genotype.  I will learn how to use a Punnet Square to predict the frequency of characteristics in offpring.

Why I will be learning this....  Every organism on Earth inherrits its characteristics from it's parents.  So do I.  Understanding observable patterns of inheritance help me understand the world around me and myself better

How I will know I learned it... I will be able to correctly demonstrate the use of a punnet square to predict  the frequency of characteristics.  I will be able to define the difference between phenotype and genotype. 

Introduction:

Every trait that an organism has is described by a genotypes and a phenotype.  The genotype is the set of genes that codes for that trait.  In other words, it is the two alleles that describe that trait ( for example "BB" or "bb").  The phenotype describes how that trait is expressed, or the  characteristic that we can actually see    (for example "brown hair" or "blond hair").  

In this activity, we will practice identifying genotypes and phenotypes by describing the traits of a bug family.  We will show how offspring receives one allele from each parent, combining the two to develop its own genotype.  In turn, that genotype determines what the phenotype of the offspring will be. 

BUG TRAITS

DOMINANT RECESSIVE
RR or Rr Red Antennae rr Green Antennae
SS or Ss 3 Body Segments ss 2 Body Segments
CC or Cc Curly Tail cc Straight Tail
LL or Ll 3 Pairs of legs ll 2 Pairs Legs
BB or Bb Blue Nose bb Green Nose
GG or Gg Green Feet gg Black Feet
EE or Ee 2 eyes ee 3 Eyes

 

 

 

 

 

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