A liger is the hybrid offspring of a male lion and a female tiger, and a tigon i
ID: 79348 • Letter: A
Question
A liger is the hybrid offspring of a male lion and a female tiger, and a tigon is the hybrid offspring of a male tiger and a female lion. They are distinct from one another in appearance and both are typically infertile Select the most likely explanation as to how a female liger could be fertile and produce viable offspring. Genome duplication generates homologous pairs, so equal segregation can occur in meiosis. Parthenogenesis occurs in an unfertilized oocyte. Unequal germline meiosis yields gametes with a haploid set of only tiger or lion chromosomes. If the fertile female liger was mated to a male tiger, what would the offspring resemble and why? would resemble a liger because the mother is a liger and contributes her liger mitochondrial genome would resemble a tigon or a tiger because the mother can contribute only lion or only tiger chromosomes would resemble a tiger because the male tiger contributes a full set of tiger chromosomesExplanation / Answer
Explanation for answer one:
Both the lion and the tiger have 38 pairs of chromosomes, therefore in a liger, before a cell goes through the process of becoming a gamete, it will already have a homologous number of chromosomes, which means that is not because a different number of chromosome that a liger or a tigon can't produce gametes but because some of their chromosomes have sequences that are different enough to avoid its alienation during the first stage of meiosis. Therefore genome duplication IS NOT THE ANSWER
Pathogenesis IS NOT THE ANSWER either as this phenomenon has never taken place in mammals due to imprinting.
Therefore the answer is:
c) Unequal germline meiosis yields gametes with a haploid set of only tiger or lion chromosomes.
An unequal germline meiosis that results in gametes with a haploid set of one of the two types of chromosomes will make them fertile.
Explanation for answer two:
b) Would resemble a tigon or tiger because the mother can contribute only lion or tiger chromosomes.
As established in the previous answer, a fertile liger female will have a mixed set of haploid gametes: half with only tiger chromosomes, half with only lion chromosomes. If a liger's female gamete, with only tiger chromosomes, gets fertilized by a tiger's male gamete (who only has tiger chromosomes to donate), a tiger offspring will be obtained. If the liger's female gamete gets fertilized, with only lion chromosomes, gets fertilized by a tiger's male gamete (who only has tiger chromosomes to donate), you will get a tigon, as is the same as if you crossed a male tiger with a female lion.
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