Non-Mendelian and X-linked traits Flashcards
What is complete dominance?
It is when an allele completely masks the other.
What type of dominance produces an intermediate phenotype?
Incomplete Dominance
What is Codominance?
When both alleles are expressed.
Complete dominance is an example of Mendelian Genetics.
True
Bloodtype is an example of what type of dominance?
Codominance
The blood type “O” recessive or dominant?
recessive
How many pairs of chromosomes do we have?
23
Why are men more affected by x-linked diseases?
Because they only have 1 copy of the X chromosome.
The combination of “XX” chromosomes means that the person is ________.
Female
Can males be a carrier of x-linked diseases?
No.
Only women can be carriers of x-linked diseases. Why?
Because they have 2 copies of the x-chromosome.
Why does incest more likely to lower survival in humans?
a smaller gene pool, lack of variation
What is epistasis?
it is when a gene has the ability to surppress the expression of another gene.
Height is one example of a ________.
polygenic trait
albinism is an example of __________
epistasis
