Genetics 1
A section of a chromosome (a section of DNA)
What is a gene
What is a genotype?
The letters that represent the trait. BB, Bb or bb
An organism's physical appearance of a gene?
phenotype
Give an example of a heterozygous genotype?
Bb or BW
Brown eyes, tall, blonde hair are all called a Genotype or Phenotype?
Phenotype
What is a phenotype?
the physical appearance of a gene.
The stronger of the two kinds of alleles(genotype letters)
What is a dominant allele
Heredity works by a combination of chance, or what we also call...
Probability
The weaker of the two kinds of alleles. The one usually least expressed in a population.
What is a recessive allele
Passing of genes from one generation to the next is called?
Heredity
What information do we need before we can fill in a Punnett square?
The parents genotype
BB= Blue petals
RR= Red petals
BR=? In Codominance
blue and red spotted petals
Neither allele is dominant or recessive
Incomplete dominance or Co-dominance
If the offspring are only tt? What are the genotypes of the parents?
tt
DD= Dark Brown
WW= White
DW=? in Incomplete Dominance
light brown
What is homozygous recessive represented as?
two lowercase letters : hh
What are the possible phenotype % of two heterozygous parents?
75% Dominant
25% recessive
Cross a homozygous dominant genotype with a homozygous recessive genotype. What are the odds of getting a homozygous recessive?
0%
Gray eyes are a recessive trait. Cross a homozygous recessive mother and a heterozygous father. What are the odds of the child having gray eyes?
50%