Answer:
liver
Explanation:
prolonged abuse of alcohol disrupts the regeneration of liver cells leading to scar tissue (cirrhosis).
Answer:
His sisters son
Explanation:
Mitochondrial DNA are small circular chromosomes found inside the mitochondria. They are passed exclusively from the mother to children through the egg cell therefore it is maternally inherited.
In the given question. Mitochondrial DNA of an extended family was sequenced and compared to a single male.
His sisters son will match because the person and the sister will have similar mitochondria since they have the same mother. The sister will pass it down to her son.
Answer:
D
Explanation:
This involves a dihybrid inheritance I.e. two genes are being passed on. During meiosis, specifically, the Prophase stage, homologous chromosomes (similar but non-identical chromosomes received from each parent) line side by side. According to the question, one chromosome contains A and B alleles and its homologue, received by the other parent carries a and b alleles. This means that the diploid individual has a genotype AaBb for that gene.
According to Mendel's law of independent assortment, the alleles separate independently of one another into gametes. I.e. allele A and a separates into the gametes without affecting alleles B and b of the other gene.
Crossing-over, which is the exchange of chromosomal segment occurs between the two homologues. Hence, the exchange of chromosomal segments containing alleles in the individual will possibly produce four gametes with the genotypes: AB, Ab, aB, ab.
Acid I think is the correct answer
