Question at position 3 What are “dizygotic twins”?Twins who developed from a single fertilized eggTwins who developed from different fertilized eggsTwins who were reared by the same familyTwins who were reared by different families

Question

Question at position 3 What are “dizygotic twins”?Twins who developed from a single fertilized eggTwins who developed from different fertilized eggsTwins who were reared by the same familyTwins who were reared by different families

BlackTom AI · Accepted Answer

To tackle the question, I’ll evaluate what each option claims about dizygotic twins and compare it to the established definition.
Option 1: 'Twins who developed from a single fertilized egg' describes monozygotic (identical) twins, not dizygotic. A single fertilized egg splits to form two individuals with nearly identical genetic material, so this option is incorrect when the term in question is dizygotic.
Option 2: 'Twins who developed from different fertilized eggs' correctly characterizes dizygotic (fraternal) twins. They originate from two separate oocytes that were fertilized by two separate sperm, resulting in genetically distinct siblings who share about 50% of their DNA on average.
Option 3: 'Twins who were reared by the same family' discusses postnatal upbringing rather than origin. Dizygotic vs monozygotic is about fertilization/embryonic development, not family environment, so this option misattributes the concept.
Option 4: 'Twins who were reared by different families' similarly conflates upbringing with the biological mechanism of twinning. The term dizygotic concerns the fertilization events, not their subsequent childcare arrangements, making this option incorrect.
In summary, the only choice that aligns with the biological definition of dizygotic twins is option 2, which states that they developed from different fertilized eggs. The other options describe monozygotic twins or confuse postnatal upbringing with the origin of twinning, which are not accurate for dizygotic twins.

Question at position 3 What are “dizygotic twins”?Twins who developed from a single fertilized eggTwins who developed from different fertilized eggsTwins who were reared by the same familyTwins who were reared by different families

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Question at position 3 What are “dizygotic twins”?Twins who developed from a single fertilized eggTwins who developed from different fertilized eggsTwins who were reared by the same familyTwins who were reared by different families

查看解析

登录即可查看完整答案

类似问题

Jack and Jill are _____ twins. They are the result of _____.

When a fertilized egg splits or divides in half after conception, the result is fraternal twins.

In a consumer society, many adults channel creativity into buying things

Economic stress and unpredictable times have resulted in a booming industry for self-help products

People born without creativity never can develop it

A product has a selling price of $20, a contribution margin ratio of 40% and fixed cost of $120,000. To make a profit of $30,000. The number of units that must be sold is: Type the number without $ and a comma. Eg: 20000

Which of the following statement regarding cost is correct:

Under the assumptions used in cost-volume-profit analysis, as the activity increases:

更多留学生实用工具

希望你的学习变得更简单

Jack and Jill are _ twins. They are the result of _.