The cross between an AABB parent and an AAbb parent can produce four possible genotypes in the offspring: AABB, AaBB, AAbb, and aabb. The probability of each genotype is as follows- AABB: 1/4 ,AaBB: 1/2 ,AAbb: 1/4 ,aabb: 0 .
In a genetic cross between an AABB parent and an AAbb parent, the resulting offspring can exhibit four distinct genotypes, each determined by the combination of alleles inherited from both parents.
The alleles represent different versions of a gene, where 'A' and 'a' denote alternative forms, and similarly, 'B' and 'b' represent alternative versions of another gene.
The AABB genotype arises when the offspring inherits the dominant alleles (A and B) from both parents.
This genotype occurs with a probability of 1/4, meaning that 25% of the offspring are expected to exhibit this particular combination.
The AaBB genotype is characterized by the inheritance of a dominant A allele from one parent and a dominant B allele from the other.
This combination occurs with a probability of 1/2, making it the most likely genotype among the offspring, constituting 50% of the population.
The AAbb genotype occurs when the offspring inherits a dominant A allele from one parent and both recessive b alleles from the other.
This genotype also has a probability of 1/4, representing 25% of the potential offspring.
The aabb genotype arises when the offspring inherits recessive alleles (a and b) from both parents.
In this case, the probability is 0, indicating that there is no chance of obtaining this genotype from the given parental combination.
These probabilities are determined by the principles of Mendelian genetics and the random assortment of alleles during the formation of gametes.
The ratios reflect the different ways alleles from the parental pairs can combine, ultimately shaping the genetic diversity within the offspring population.