Yes, the different frequencies of evolutionary change could affect allele frequency in a population.
<h3>What are the agents of evolutionary change? </h3>
All populations are usual in a constant state of evolution. This means that all the species are continuously changing their genetic makeup over different generations. These changes can be subtle or they can be spontaneous.
If a population is not evolving, it is said to be in Hardy - Weinberg state. In this state, the allele frequency and the genetic makeup of the population will remain the same across generations.
The agents of evolutionary change defy the Hardy - Weinberg state. These are mutation, gene flow, non-random mating, natural selection and genetic drift.
Read more about evolutionary change, here
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Answer:
(a) 1/2; (b) no
Explanation:
Glucose-6-phosphate dehydrogenase deficiency (G6PD) is an X-linked recessive disorder and the woman's father was diseased so it means that woman is a carrier of the allele but has normal phenotype. It means that she will have XXᵇ genotype.
In contrast to this, her husband is diseased so his genotype will be XᵇY.
The Punnett square diagram related to the cross is attached.
(a) Proportion of their sons expected to be G6PD is 1/2:
They both may give birth to 4 progeny with genotypes XXᵇ, XᵇXᵇ, XY and XᵇY. It means they both may have 2 sons out of which one with genotype XᵇY will be diseased while the one with genotype XY will be healthy. So the proportion of their sons having G6PD is 1/2 or 50%.
(b) If the husband were G6PD deficient, the answer will not change.
The reason behind this is that this disease is caused by an allele located in X chromosome. But father contributes only Y chromosome to his son not X chromosome. The X chromosome will affect the genotype of his daughter not son that is why answer will not change. It means they will still have 1/2 of their sons diseased.
The vertebrae protects the spinal cord
The correct answer to this open question is the following.
Although there are no options attached we can say the following.
This mechanism describes the necessity of males to lead and form their own pride to show their dominance and power. That is why young lions leave and wander, and when they are ready, they fight for their right to lead their own pride.
So yes, Females tend to stay in their pride, but males may leave to join another pride. And that is the male instinct for lions in the wildlife.
On the other hand, males tend to stay in the same pride, taking care of their cubs, raising them, and hunting. That is what they do best, hunt animals to feed the pride and the cubs.
