Monohybrid Crosses

Biology final

Monohybrid Cross

A cross between 2 individuals that differ in only one specific trait.

Punnet Squares

Show the probability that a genotype is expressed in an individual.

Autosomal disorders

Genetic conditions that result from mutations in genes located in autosomes. They can be dominant or recessive.

Autosomal dominant disorders

A single copy of the mutated gene from one of the parents is enough to cause the disease. Ex: Hutchinson’s disease.

Condominance

Both alleles are expressed in an heterozygote. Ex: Blood type A+B= AB

Incomplete dominance

Occurs when the heterozygote is intermediate between two homozygotes, a mix of two traits. Ex: Curly hair + Straight hair= Wavy hair.

Hemophilia

Blood clotting, the gene is located in the chromosome X.

Autosome

Any chromosome in a cell that is not a sex chromosome. They control the inheritance of physical and metabolic traits.

Punnet square

B= dominant allele.

b= recessive allele.