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General Biology Name: Bio 101 Homework Patterns of Inheritance This week we used the genetics cards to illustrate important genetic principles. This homework packet is aimed at addressing your understanding of these concepts. 1. Define the Law of Segregation using the book definition, THEN explain this concept using your own words. 2. Define the Law of Independent Assortment using the book definition, THEN explain this concept using your own words. 3. How do the Law of Segregation, Law of Independent Assortment, AND Crossing Over create genetic diversity during meiosis? 4. Define the following terms (using your own words) a. Homozygous b. Heterozygous c. Allele d. Locus e. Dominant (alleles) f. Recessive (alleles) g. Genotype h. Phenotype i. Linkage

ALM Genetics

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ALM Genetics

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Page 1: ALM Genetics

General  Biology                                                                                                                                                                                                                  Name:  Bio  101  Homework  Patterns  of  Inheritance    This  week  we  used  the  genetics  cards  to  illustrate  important  genetic  principles.  This  homework  packet  is  aimed  at  addressing  your  understanding  of  these  concepts.      

1. Define  the  Law  of  Segregation  using  the  book  definition,  THEN  explain  this  concept  using  your  own  words.    

       

2. Define  the  Law  of  Independent  Assortment  using  the  book  definition,  THEN  explain  this  concept  using  your  own  words.  

     

3. How  do  the  Law  of  Segregation,  Law  of  Independent  Assortment,  AND  Crossing  Over  create  genetic  diversity  during  meiosis?  

       

4. Define  the  following  terms  (using  your  own  words)  a. Homozygous  

   

b. Heterozygous      

c. Allele      

d. Locus      

e. Dominant  (alleles)      

f. Recessive  (alleles)      

g. Genotype      

h. Phenotype      

i. Linkage    

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 5. On  the  back  of  the  paper,  draw  two  homologous  chromosomes  that  are  

heterozygous  for  the  “elephant  ears.”  Would  this  person  have  the  elephant  ears  phenotype  if  the  normal  ears  allele  is  dominant?  

       

6. If  a  woman  who  is  heterozygous  for  attached  earlobes  (Aa-­‐  attached  earlobes  is  the  recessive  allele)  and  also  for  widow’s  peak  (Ww  –Widows  peak  is  the  dominant  allele)  reproduces  with  a  man  who  is  also  heterozygous  for  both  of  these  traits,  what  are  all  the  possible  phenotypic  outcomes  of  their  potential  offspring.  Use  the  back  to  draw  a  dihybrid  cross.  

   

7. The  following  pedigree  illustrates  a  family  in  which  a  father  and  a  son  both  share  a  recessive  disorder  for  the  gene  that  causes  an  autosomal  recessive  disease.    What  are  the  genotypes  of  all  the  members  of  the  family?      

 

   

 8. Why  do  sex-­‐linked  disorders  affect  mostly  male  offspring?  

     

9. What  are  the  four  non-­‐Mendelian  modes  of  inheritance  (described  in  class)?    Please  describe  them  in  your  own  words.