Genetics 1
The passing of traits from parents to offspring is called
heredity
The type of allele in whose trait always shows up in the organism if the allele is present
dominant allele
A cross with a Tt pea plant and another Tt pea plant will result in what probability for a short pea plant?
25%
An organism with two different alleles for a trait is called what?
heterozygous
What is the study of heredity?
Genetics
Physical characteristics are called
traits
The type of allele that can be masked, or covered up
recessive allele
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%
if an organism's genotype is TT, it is homozygous recessive.
True or False
Which gender has XY chromosomes?
Male
Humans have a total of __ chromosomes.
46
Where are chromosomes located?
Nucleus of cells
What is an organism's genotype?
Its genetic makeup, or allele combination
For example TT, Tt ,tt, BB, Bb, bb
If an organism's genotype is tt, it is heterozygous.
True or False
False
Asexual reproduction requires requires one parent to produce offspring.
True
Factors that control traits are called
genes
A chart that shows all the possible combinations of alleles that can result from a genetic cross
Punnett square
What is an organism's phenotype?
Its physical appearance or traits
( For example a tall pea plant or a black guinea pig)
If an organism's genotype is Tt, it is heterozygous.
True or False
True
The monk who performed experiments on pea plants, known as the father of genetics
Gregor Mendel
The different forms of a gene are called
alleles
The likelihood that an event will occur
Probability
An organism with two identical alleles is called what?
homozygous
Which is considered the phenotype?
Mm, ll. TT OR red hair vs brown hair
red hair vs brown hair
Which gender has XX chromosomes?
Female