Answer: The probability that the two children have the disease is 1/16 or 6,25%
Explanation: If the disease only occurs in homozygous individuals and the parents have the trait but not the disease that means is a recesive allele and the parents are heterozygous for this trait.
According to proportions stablished by Mendel, when there is a cross between 2 heterozygous (Ss x Ss) indivdials the probability to obtain a homozygous recesive (ss) descendant is 25% or 1/4 as shown in punnet square below:
Taking into account that the condition of the first kid does not imply the condition for the second, it should be analyzed as 2 independent events.
1. First kid has 1/4 of probability have the dissease as shown in punnet square
2. For a second birth, child has the 25% chance to have the disease
The probability that both events to happen is the product of each event probabilty:
p = 1/4 * 1/4 = 1/16 or 6,25%
1. ^^Savanna is not a continent.
2. Antarctica is not mostly desert at all. Its cold.
3. Answer: Africa...
Answer: The trophic levels of a food chain are the number of steps from the beginning of the chain.
Explanation:
A food web/chain starts with trophic level 1 (primary producers), trophic level 2 (herbivores), trophic level 3 (carnivores) and so on.
Yes it is therefore the answer is true
Social researchers generally study ethics. they study human psychology for example. if they are biased in their surveys, that is not an ethical consideration.