Multiple Choice
Approximately how large is a typical eukaryotic gene?
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1. Introduction to Genetics
Fundamentals of Genetics
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An elephant has 56 chromosomes. Which statement about a zygote of an elephant is true?
A
The zygote contains 112 chromosomes, with 56 from each parent.
B
The zygote contains 56 chromosomes, all inherited from the father.
C
The zygote contains 28 chromosomes, all inherited from the mother.
D
The zygote contains 56 chromosomes, with 28 inherited from each parent.
Verified step by step guidance1
Understand that the chromosome number given (56) refers to the diploid number (2n) in elephants, meaning each somatic cell has 56 chromosomes arranged in pairs.
Recall that gametes (sperm and egg) are haploid cells, containing half the diploid number of chromosomes, so each gamete has n = 28 chromosomes.
Recognize that a zygote forms when two haploid gametes fuse during fertilization, combining their chromosomes.
Therefore, the zygote will have the diploid number of chromosomes, which is the sum of the chromosomes from each parent: 28 from the mother and 28 from the father, totaling 56.
Conclude that the correct statement is that the zygote contains 56 chromosomes, with 28 inherited from each parent.
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