Bio 12 genes test
what is a trait?
a characteristic like height or colour
what are genes?
they are found on chromosomes, and they control traits
What are Allees?
different forms of genes ex. B or b
what is a Phenotype?
the outward appearance of a trait (tall pea plant)
what is a Genotype?
the alleles (or genes)that make up a trait, represented by letters (T)
Organisms that have two identical alleles for a particular trait are called?
Organisms that have two different alleles for the same trait are called?
What are Punnett squares used to show?
The possible combinations of gametes.
What is the law of segregation
The two factors (alleles) separate when the gametes are formed, and only one factor (allele) is present in each gamete
what is a MonohybridCrosses
Bb x Bb for example
Dihybrid Cross (following twotraits)
AaBb x AaBb
Law of Independent Assortment
Genes for various traits are assorted into gametes independently (due to homologues lining up randomly at the metaphase plate).
incomplete dominance and co-dominance
If there are only two alleles involved in determining the phenotype of a certain trait, but there are three possible phenotypes, then this can be either incomplete dominance or co-dominance
what is Co-dominance?
a mixing of the other phenotypes with both appearing at the same time
what is Incomplete Dominance?
a blend of the other two phenotypes
How many alles will we always have in each gene
what are the 4 main blood types?
: Allele for type A blood
: Allele for type B blood
: Allele for type AB blood
: Allele for type O blood
what is An antibody?
An antibody is a special protein which is part of our immune system which helps rid our body of invading cells and microbes.
if your blood types is____ then you will produce the antibody ____
A = B
B = A
O = A and B
AB = none
what is Rhesus factor?
When your blood cells are also further identified by another marker protein called the “rh”
what happens if you have "rh" or you don't?
If you have this marker protein you are rh+ and if you do not have it you are rh-.
what happens if you are "rh-"
If you are "rh-" you do produce the rh antibodies.
what happens if your rh+
If you are rh+ you do not produce rh antibodies
Traits controlled by genes found on the sex chromosomes are called what?
what can men only have involing sex linked genes
Since only men inherit Y chromosomes, they are the only ones to inherit Y-linked traits
What can both Men and Women get from sex linked genes?
Men and women can get the X-linked ones since both inherit X chromosomes.
Autosomal chromosome disorder that is expressed differently depending on hormones present.
What is a pedigree chart?
An illustrateion of the inheritance of a gene within a family
what represents the males and the females on a pedigree chart?
males aresymbolized by a square (□) and females are symbolized by a circle (○)
sex linked mean?
Bio 12 genes test