Tt
TT
Tt
TT
Sex-linked
Alleles
Recessive
XY
Red and white
White only
Red only
Pink only
A homozygous cross
A test cross
A monohybrid cross
A dihybrid cross
Purebred
Dominant
Heterozygous
Recessive
Expressed and the other allele is not.
A very common allele in the population.
The weaker of the two alleles.
More desirable than the other allele.
Recessive traits.
Dominant alleles.
Genotype.
Phenotype.
Phenotypes of parents
Genotypes of offspring
Test-crosses of offspring
Chromosomes of parents
Law of genetic linkage
Law of segregation
Law of independent assortment
Law of inheritance
Masked by the dominant allele.
The least common allele in a population.
The most common allele in a population.
Harmful to the organism.
Random fertilization of gametes.
Genetic variation within species.
Greater strength of dominant alleles.
Final stages of gametogenesis.
25%
50%
75%
100%
A Y chromosome.
An inactivated allele.
Two recessive alleles.
Two dominant alleles.
RR and RR
Rr and RR
Rr and rr
RR and rr
The X chromosome only has genes for genetic disorders.
The Y chromosome cannot have genes that cause genetic disorders.
The Y chromosome cannot mask alleles on the X chromosome.
The X chromosome has genes only for sex determination.
A and B
A and C
B and C
B and D
Alleles
Genes
Chromosomes
Recessive traits
Pedigree
Punnett square
Genetic linkage
DNA sequence
Mendel
Watson and Crick
Mack
Einstein
Incomplete dominance
Co-dominance
Multiple allele
Sex-linked