Multiple allele so far we have studied traits or genes that are coded for by just two alleles. like in rabbits, there was one allele for brown hair color and one allele for white hair. however, some traits are coded for by more than two alleles. one of these is blood type in humans. this is a violation of mendel’s principle of unit characteristics. 5. in humans, there are four types of blood; type a, type b, type ab, and type o. the alleles a and b are codominant to each other and the o allele is recessive to both a and b alleles. so a person with the genotype aa or ao will have a type of blood. (5pts) a. what possible genotypes will produce b type of blood

The correct answer is BB genotype and BO genotype.

Explanation:

The human blood system or ABO system shows codominance due to the multiple alleles. That means three different alleles for human blood type are present are IA, IB, and i. For easy understanding can be stated as A (for IA), B (for IB), and O (for i).

If someone has blood type B could have a genotype of either BB or BO because of the dominance of B allele on O where is If A allele present with B allele it would show co-dominance.

Thus, the correct answer is the BB genotype and BO genotype.

answer: decrease

a limiting factor is the one which decrease the abundance, distribution and causes extinction of the population of species in a ecosystem. here, predators including hawks, owls and snakes are the limiting factor for the population of mexican free tailed bat.   although bats are nocturnal animals as they forge for food at night these predators also may remain active during night which can decrease the population of the mexican free-tailed bats. also, these bats eat only one type of insects that are moths. the food can also be a limiting factor as all 400 members are dependent upon same type of food needs that are moths. the decrease in the moth population can cause decrease in population size of the mexican free-tailed bats.

therefore, the scenarios will most likely to decrease the population size of the mexican free-tailed bats.  

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.