Final Flashcards
Name three of Mendel’s laws
- Law of segregation,
- law of independent assortment,
- law of dominance
each gamete contains on allele of the two alleles possessed by the organism
Law of segregation
when examining multiple character, the traits for each character will assort independently of each other
law of independent assortment
when examining tow different alleles, the phenotype of the dominant allele will be displayed in the organism while the phenotype of the recessive organism will not be seen
law of dominance
what is the law of segregation
each gamete contains one allele of the two alleles posed by an organism
What is the law of independent assortment
When examining multiple characters, the traits for each character will assort independently of each other.
What is the law of dominance
When examining two different alleles, the phenotype of the dominant allele will be displayed in the organism while the phenotype of the recessive organism will not be seen.
Phenotypically, homozygous dominant and heterozygous organisms appear the same
the cross test
to differentiate between those two possibilities.
the purpose of the cross test
The dominant phenotype organism is crossed with a recessive phenotype organism
the purpose of the cross test
- If all of the offspring have the dominant phenotype, the unknown parental organism was homozygous for the dominant allele
- If the offspring are have a 1:1 ratio of dominant to recessive phenotypes, then the unknown parental organism was heterozygous for the dominant allele
Briefly describe the purpose of a test cross.
Phenotypically, homozygous dominant and heterozygous organisms appear the same. The purpose of the test cross is to differentiate between those two possibilities.
The dominant phenotype organism is crossed with a recessive phenotype organism
If all of the offspring have the dominant phenotype, the unknown parental organism was homozygous for the dominant allele
If the offspring are have a 1:1 ratio of dominant to recessive phenotypes, then the unknown parental organism was heterozygous for the dominant allele
There are three alleles for ABO blood type
- IA is responsible for making carbohydrate A
- IB is responsible for making carbohydrate B
- i does not make any carbohydrate
is responsible for making carbohydrate A
IA
is responsible for making carbohydrate B
IB
does not make any carbohydrate
i
ABO blood type is depended on the assortment of these three alleles.
The blood type is based on which carbohydrate(s) a person can make.
People with AB blood type make both carbohydrates (Genotype: IA, IB)
People with A blood type only make A carbohydrate (Genotype IA, IA or IA, i)
People with B blood type only make A carbohydrate (Genotype IB, IB or IB, i)
People with O blood type only make no carbohydrates (Genotype i, i)
People with AB blood type make both carbohydrates
Genotype IA, IB
People with A blood type only make A carbohydrate
Genotype IA, IA or IA, i
People with B blood type only make A carbohydrate
Genotype IB, IB or IB, i
People with O blood type only make no carbohydrates
Genotype i, i
The Rh blood system is governed by a pair of genes that assort independently of the ABO gene.
- Rh + individuals are either homozygous for the allele that makes the Rh protein or are heterozygous.
- Rh – individuals are homozygous for the allele that does not make the Rh protein
3) Briefly describe how the blood type is determined in the ABO and Rh blood system.
There are three alleles for ABO blood type
IA is responsible for making carbohydrate A
IB is responsible for making carbohydrate B
i does not make any carbohydrate
ABO blood type is depended on the assortment of these three alleles. The blood type is based on which carbohydrate(s) a person can make.
People with AB blood type make both carbohydrates (Genotype: IA, IB)
People with A blood type only make A carbohydrate (Genotype IA, IA or IA, i)
People with B blood type only make A carbohydrate (Genotype IB, IB or IB, i)
People with O blood type only make no carbohydrates (Genotype i, i)
The Rh blood system is governed by a pair of genes that assort independently of the ABO gene.
Rh + individuals are either homozygous for the allele that makes the Rh protein or are heterozygous.
Rh – individuals are homozygous for the allele that does not make the Rh protein.