(M) Non-Mendelian Genetics Flashcards
T or F. Non-mendelian genetics describes the inheritance of traits linked to single genes on chromosomes in nucleus
F (mendelian)
Any pattern of inheritance in which traits do not segregate
Non-mendelian
T or F. Non-Mendelian genetics are affected by several loci such as gene location (inside/outside the nucleus), chromosome placement, environmental factors, and variations in protein properties encoded by different gene alleles
T
A condition when during the heterozygous condition the dominant allele does not completely overpower the recessive allele
Incomplete Dominance
T or F. Codominance is a condition of blending of traits.
F (inc. dominance)
What allele only partially mask the presence of recessive trait in the inc dominance?
dominant allele DUH
What genetics is either allele is dominant or recessive; both allele are expressed/manifested
Codominance
T or F. In codominance, multiple alleles is also applies
T
T or F. The inheritance pattern of the ABO blood group exhibits Codominance only.
F (and multiple alleles also)
6 genotypes of blood
AA, AO, BB, BO, AB, OO
4 phenotypes in blood
A, B, AB, O
3 alleles: in blood
A, B, O
AKA silent genotype that will not produce an A and B antigen because it is always homozygous
type O
the body will create an antibody against A and B but it can donate to whoever
Type O
This blood types can be homozygous or heterozygous
A and B
Inheritance pattern for traits that are controlled by more than one gene
Polygenic Inheritance
T or F. In polygenic inherticance, there’s a transition of phenotype because multiple genes affects the inheritance of one trait
T
T or F. Mother’s with lethal genes would mostly prefer to risk their offspring than resort to abortion.
F (abortion>high probability of still birth)
Genes capable of causing death of organism carrying them
Lethal genes
this displays family relationships and depict which relatives have specific phenotypes and sometimes genotypes
Pedigrees
In incomplete dominance. what is the ratio of red: pink: white example?
1:2:1
T or F: In incomplete dominance, there is a blending of trait
True
In this nonmendelain genetics, there is no blending regardless of how the dominant allele do not overpower the recessive one
Codominance
What is the homogeneous to heterogenous ratio of sickle cell anemia
2:2
In codominance, if the parents both have sickle cell trait, how many children are:
- not affected
- has sickle cell trait
- has sickle cell anemia?
1, 2, 1
T or F: Sickle cell trait = sickle cell anemia
False
How does the ABO blood system present codominance?
A and B are both dominant in AB group (there’s no recessive)
How does the sickle cell anemia exhibit codominance?
Sickle cell trait both have sickle cell tendencies and normal blood tendencies (there’s no recessive)
Example of lethal genes
Tay Sachs and Huntington
Also achondroplasia
If both parents have achondroplasia (heterogenous parents), what is the homogenous and heterogenous ratio of the offsprings?
2:2
If both parents have achondorplasia (heterogenous parents), what is the number of those who:
- have normal height
- have achondroplasia
- die
1, 2, 1
Is achondroplasia dominant or recessive?
Dominant
If one of the parents has achondroplasia, what is the normal height to achondroplasia ratio?
1:1
Achondroplasia is an example of which nonmendelian genetics?
Lethal gene
