Who's genes are you wearing?
Blame your mom for x-linked traits
Oh Heck Yeah to Genetics!
My Phenotype Cooks
Check out my X'tra large genes?
100
What do the letters on the inside of a Punnett Square specifically represent?
Genotypes of offspring
100
What is a different version of the same gene called?
Allele
100
What is a pair of chromosomes (paternal & maternal) called that carry the same genes in the same order?
pair of homologous chromosomes
100
What does a shaded square represent on a Pedigree?
A male that has the trait.
100
Describe an individual who is a carrier. What genotype do carriers have?
Carrier is someone who carries an allele for the trait but does not have it. Genotype must be heterozygous
200
Describe the difference between genotype & phenotype and provide an example.
Genotype is made of two alleles (ex. AA). Phenotype is the physical trait expressed (eye color)
200
Fruit flies with red eye color will usually have long wing size whereas fruit flies with purple eyes will have short wings. This is an example of what kind of inheritance?
Linked Genes
200
Blood type is determined by a combination of alleles such as A, B, or i. This is an example of what kind of inheritance?
Multiple Allele Inheritance
200
How are x-linked recessive traits different from autosomal recessive traits on a pedigree?
x-linked affect males more than females whereas autosomal recessive affect both sexes equally.
200
Colorblindness is a recessive x-linked disorder. Write a genotype that represents a female who is colorblind? Use B or b to represent colorblindness alleles
XbXb
300
Who is more affected by X-linked recessive disorders and why?
Males, because males only need one recessive allele to be affected whereas females would need two recessive alleles.
300
Describe incomplete dominance and provide an example of an incomplete dominant trait.
Incomplete dominance is when neither alleles are fully expressed in the phenotype, but rather a intermediate blend of the two. Ex. Red flowers x White flowers = Pink Flowers
300
Describe Codominance and provide an example of a codominant trait
Codominance is a form of inheritance where both alleles are fully and separately expressed in the phenotype. Ex. Red flowers x white flowers = red/white speckled flowers.
300
In tomatoes, red fruit (R) is dominant to yellow fruit (r). Cross a homozygous dominant fruit with a heterozygous fruit. What percentage of their offspring will have yellow fruit?
0%
300
Can someone be a carrier for dominant traits? Justify your answer.
No. Having a single dominant allele will make you express the trait. So you cannot be carrier.
400
Hemophilia is an example of an x-linked recessive disorder. If a carrier female has a child with a normal male, what is the chance of their child having hemophilia?
25%
400
If a person with blood type AB has a child with a person with blood type O, what are the possible blood types of their offspring? ***Show Slide
A & B
400
Determine the inheritance pattern of this pedigree and the genotypes of each individual. (2 minutes) ***Show Slide
See Mr. Singh's Answer
400
Determine the inheritance pattern of this pedigree and the genotypes of each individual. (2 minutes) ***Show Slide
See Mr. Singh's Answer
400
List 3 key differences between mitosis and meiosis
Mitosis for growth and replacing worn out cells whereas meiosis to create gametes for sexual reproduction.
Mitosis does PMAT x1 while meiosis does PMAT x2
Mitosis creates identical daughter cells whereas meiosis creates genetically different daughter cells