Show:
Mendel's Basics
Genotype vs Phenotype
Punnett Squares
Complex forms of inheritance
Sample Questions
100
Gregor Mendel worked with what kind of organism?
Pea plants
100
The alleles an organism carries for a particular traits is known as its......
Genotype
100
In a punnett square - what goes on the top and sides of the square?
The parents genotypes
100
Traits that are coded by MANY genes is known as.....
Polygenic
100
If i gave you the genotype Rr, which of the alleles is dominant?
R
200
Mendel found that there are different versions of genes. These different versions are referred to as.....
Alleles
200
When two alleles for a trait are the same it is known as being _______________ for the trait
Homozygous
200
In a punnett square - what do the letters inside the boxes represent?
Possible genotypes of offspring
200
If you crossed a white plant with a green plant and the result was a white and green striped plant, what type of inheritance was involved?
Codominance
200
The device used to organize teh posslbe genetic makeup of offspring is called what?
Punnett Square
300
Alleles that are sometimes "hidden" in the presence of another allele are considered....
Recessive
300
When two different alleles were inherited for a trait it is known as being _____________ for the trait. Of the two alleles which one will be expressed?
Heterozygous, The Dominant allele
300
When doing a heterozgyous cross, what percent of the offspring will also be heterozygous?
50%
300
Blood type has three different alleles possible and BOTH allleles that a person inherits are fully expressed. What TWO types of inheritance are seen here?
Mulitple alleles and Codominance
300
If two parents with dominant phenotypes produce an offspring with a recessive phenotype, then probably....A. both parents are homozgyous B. ONE PARENT IS HOMOZYGOUS c. BOTH PARENTS ARE HETEROZYGOUS d. one parent is heterozygous and the other is homozygous recessive
c. BOTH PARENTS ARE HETEROZYGOUS
400
When crossing two plants with contrasting traits mendel produced an organism known as a ______
Hybrid
400
If a trait shows up in the offspring of a set of parents, neither of which show the trait, what does that mean about the allele that codes for it? What does that mean about the genotypes of the parents?
The allele is recessive, the parents were both Heterozygous
400
If you crossed a homozygous recessive organisms with a heterozygous... what percent of the offspring will express the recessive trait?
50%
400
When a person is heterozygous for certain genetic disorders, they exhibit an intermediate form of the disorder. This would be an example of what type of inheritance?
Incomplete dominance
400
Hemophilia in humans is due to an X-chromosome mutation. What will be the result of a mating between a normal female and a hemophiliac male? A. Half of daughters are normal half of sons are hemophilic B. All sons are normal and all daughters are carriers C. Half of the sons are normal and all the sons are carriers D. Half of daughters are carriers and all the sons are normal
B. All sons are normal and all daughters are carriers
500
If an organisms shows a recessive trait. What does that mean about its genotype?
Homozygous Recessive
500
An example of this would be... Brown eyes, blue eyes, Purple flowers, green seeds, achondroplasia.. this is determined by your genotype
Phenotype
500
When Crossing two heterozygous organisms, what percent of their offspring will express the dominant trait?
75%
500
The tips of siamese cats ears and their toes are often times different colors from the rest of their body. This is because their temperature here is lower. This would be an example of what?
Environmentally influenced traits