In moths male is _.
Correct answer: C. Homogametic
- A. Heterogametic
- B. Dieogametic
- C. Homogametic
- D. Both B and C
Explanation
Moths and butterflies, have a female heterogametic sex chromosome system, with most females having a ZW constitution while males are ZZ.
This question appeared on the UHS MDCAT 2008 paper, which you can sit online with every answer explained.
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About X-linked Recessive Inheritance
X-linked recessive inheritance involves genes on the X chromosome, so males express a recessive allele with no corresponding allele on their single X chromosome, while females may be carriers. Pedigrees cover haemophilia and red-green colour blindness, including carrier mothers, affected sons and the absence of father-to-son transmission.
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More X-linked Recessive Inheritance questions
Which of the following traits is transmitted directly from an affected father to only his son?
In an X-linked recessive disease, a affected woman married to a normal man, the percentage of affected daughters is:
A student read a case in which a woman had died of haemophilia in the 1980s. The case is:
When a disease is transmitted directly from an affected father to his son, it is called:
In male the sex determining gene is
The gene for red-green color blindness is present on: