Question

1.Long-tailed dogs and short-tailed dogs produce offspring with medium-length tails.

2. There are two possible colors for a flower, and one is more common than the other.
3. The height of an individual is determined by multiple genes working together.
4. Despite alleles for A, B, and O being present, only AB blood type is expressed.

a) incomplete dominance
b) polygenic inheritance
c) multiple allele
d) dominant-resessive

Answer 1

In the provided examples, long-tailed and short-tailed dogs breeding for medium-length offspring illustrate incomplete dominance, height influenced by multiple genes is polygenic inheritance, and the AB blood type's exclusive expression signifies codominance.

Step-by-step explanation:

Inheritance Patterns

When we consider the inheritance patterns presented in the scenarios:

• Long-tailed dogs and short-tailed dogs producing offspring with medium-length tails is an example of incomplete dominance.
• The occurrence of a more common color in flowers among two possible colors could be an example of dominant-recessive patterns, where the more common color is likely due to a dominant allele.
• The height of an individual being determined by multiple genes is known as polygenic inheritance.
• The exclusive expression of AB blood type despite the presence of alleles for A, B, and O suggests a situation of codominance, where both A and B alleles are equally expressed. An example of incomplete dominance is seen in the flower color inheritance, where a cross between red and white flowers produce pink flowers. Codominance is exemplified in the AB blood type in humans, where both alleles contribute to the phenotype. In Labrador retrievers, fur color is an instance of epistasis, where one gene's expression depends on the presence of one or more 'modifier genes'. Rabbits display multiple alleles influencing coat colors, with different dominance hierarchies among the alleles.