Genetics A
What organism did the very famous Gregor Mendel study in his garden?
Pea Plants
+400
The type of allele in whose trait always shows up in the organism if the allele is present
dominant allele
+500
A cross with a Tt (tall) pea plant and another tt pea plant will result in what probability for a short pea plant?
50%
-300
An organism with two different alleles for a trait is called what?
heterozygous
+300
What is the study of heredity?
Genetics
+500
Physical characteristics are called
traits
-300
The type of allele that can be masked, or covered up
recessive allele
-300
A cross with a BB (black guinea pig) and a bb (white guinea pig) will result in what probability of a white guinea pig?
0%
-400
name of the Genotype if an organism's is TT
Homozygous dominant
-400
In aliens, having one eye is dominant and having three eyes is recessive.
If an alien that is homozygous recessive for eyes crosses with an alien that is heterozygous, what are the genotypes of the parent aliens?
Parent 1: ee
Parent 2: Ee
-400
Humans have a total of __ chromosomes in each stomach cell.
46
+500
Where are chromosomes located?
Nucleus of cells
+100
What is an organism's genotype? Give an example.
Its genetic makeup, or allele combination
For example TT, Tt ,tt, BB, Bb, bb
+600
The name of the genotype if an organism's is hybrid.
heterozygous
+500
A strange disorder causing toes to sprout out of one's neck is discovered to be dominant.
A heterozygous female married a homozygous dominant male.
What percent chance do the offspring have of toes sprouting out of their neck?
100% chance of toes sprouting out of neck.
-400
Factors that control traits are called
genes
+600
A chart that shows all the possible combinations of alleles that can result from a genetic cross
Punnett square
-400
What is an organism's phenotype? Give an example.
Its physical appearance or traits
( For example a tall pea plant or a black guinea pig)
-600
Possible letter code if the organism is purebred for the recessive trait.
bb (or any other letter as long as both are lowercase).
-600
In DNA, if there is 18% of the base Thymine present, how much
...Cytosine would there be?
...Adenine would there be?
...Guanine would there be?
Cytosine: 32%
Adenine: 18%
Guanine: 32%
+600
The different forms of a gene are represented by/called
alleles
-200
Having whiskers is dominant (W) to not having whiskers (w) in cats. A mother cat is homozygous recessive for the trait, and a father cat is heterozygous.
What genotypes can result from the cross? What phenotypes?
Ww (50%), ww (50%)
Whiskers (50%), no whiskers (50%)
+500
An organism with two identical alleles is called what?
homozygous
-200
What would be the complementary strand of DNA for the sequence of bases ACC TCT AGT ?
TGG AGA TCA
+700
What are the genotypes for each parent if 1/4 of the offspring in a punnett square is homozygous recessive?
Both heterozygous.
-600