Answer:
Both parents would have to have one recessive gene.
Explanation:
Blond haired people have two recessive genes to have blond hair. Dark hair is dominant over blond hair. If B represents dark hair and b represents blond a person could have the two genes B and b. The dominant gene will win. For example: Bb produces dark hair. BB produces dark hair, but bb produces blond hair. Two blond haired people each will give a b characteristic to the offspring, producing blond hair. Two parents with Bb genes each have 1/2 chance of giving a b gene. Therefore two dark haired parents Bb have 1/4 chance of having a blond offspring. 1/2 times 1/2 gives 1/4 chance (if they have both the dominant and recessive genes).Two parents with BB can not have a blond haired offspring.
<span>irradiation is a process that uses gamma rays to eliminate harmful bacteria in meat and poultry .It is the process by which an object is exposed to ionising radiation from various sources.This treatment is used to preserve food, prevent the spread of bacteria and delay ripening.</span>
When looking at fossils from a specific animal, with further detail it can be determined if there are any animals that are living now that could possibly be related to each other. For example it can be determined that a elephant was related to the once known mammoths simply because of how similar there bone structure was and the way they looked physically. If elephants were once mammoths then it could be suggested that after a long period of time they evolved to live in warm climate which made them lose their fur and how they became smaller in size.