Answer:
Box 1: AA
Box 2: Aa
Box 3: AA
Explanation:
In order to figure out the pedigree, you first have to do a punnet square- kind of like cross-multiplying. EX: For the first box: Aa x AA
For box one, we know that it is Aa, and not AA, because box 2 has to be AA.
We know that because Aa X Aa would give us some "aa" offspring which we do not see in the last generation (see 2nd pic). The only way to get no "aa" offspring is to have an AA X Aa cross.
<span>1) It is the chromosomes, however, that assort independently, not individual genes.
2) </span> <span>It tells you they're really far apart.
You see, there's this phenomenon called crossing over. Chunks of DNA get randomly swapped between homologous chromosomes. If two genes are close together they're usually swapped together and if they're far apart (say, on opposite ends) they're probably never going to be swapped together because half a chromosome doesn't normally cross over at once.
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3) <span>Sexual reproduction, because it results in offspring that combine alleles from two different individuals. </span>
<span>(Crossover is fine and dandy and you should mention it, but you'd get a C if you didn't mention that two different individuals are contributing genetic material to the offspring)</span>
By looking at picture given, the structure that the placenta will normally develop in is the area D. The picture is of the female reproductive system. The structure where the placenta develops is called the uterus.
Answer:
Explanation:
Fundamental niche is the entire set of conditions under which an animal (population, species) can survive and reproduce itself. Realized niche is the set of conditions actually used by given animal (pop, species), after interactions with other species (predation and especially competition) have been taken into account
Answer:
<em>The correct option is D) glial cell</em>
Explanation:
The function of the glial cells is to cover the neurons and to provide insulation between them. They also supply the neurons with oxygen and nutrients. The glial cells are also involved in protecting the neurons from pathogens and removing the dead neurons. Hence, glial cells perform functions other than producing actions when a stimuli is detected.
Other options like option B, sensory neurons, helps to convert external stimuli into electrical impulses.