Answer:
D. Aa
Explanation:
Provided:
Jill (the mother) is heterozygous regarding gene A --------- Jill = Aa
Jack (the father) is homozygous recessive for gene A-------- Jack = aa
Now, when fertilization takes place, we result in:
A a
a Aa aa
a Aa aa
The offspring combinations are (Aa, Aa, aa, aa)
Nondisjunction refers to the failure of homologous chromosomes to separate correctly during cell division. In this scenario, it is stated that the fertilization experienced nondisjunction during meiosis 1, leading both homologous chromosomes to migrate into one daughter cell instead of distributing to two due to improper separation.
Consequently, the fertilization of a normal haploid sperm with a nondisjunction-affected egg produces offspring characterized by the genotype Aa from their mother (Jill).
It is correct <span>that alterations in membrane permeability or ion concentration can affect the resting membrane potential. The resting membrane potential is defined by the voltage across the membrane of a neuron at rest. This potential is influenced by the concentration gradients of ions such as Na+ and K+ and by how permeable the membrane is to these ions. In a resting neuron, there exist concentration gradients for Na+ and K+ ions across the membrane. Ions traverse their gradients through channels, which results in a charge separation that establishes the resting potential.</span>
The correct next step in this experiment would be to analyze the results and come to a conclusion.
Answer:
d. One additional neutron
Explanation:
Phosphorus-32, a radioactive variant of phosphorus, possesses 15 protons and 17 neutrons.
Conversely, Phosphorus-31, the most prevalent isotope of phosphorus, contains 15 protons and 16 neutrons.
This indicates that one isotope has one more neutron than the other.
