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Question
Brief about female heterogamety.
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Solution
Female heterogamety (ZO females) refers to the condition, where female produces two types of egg cells. Some with Z chromosome and some without Z chromosome.
RELATED QUESTIONS
Differentiate between ‘ZZ’ and ‘XY’ type of sex-determination mechanisms.
"The sex of a newborn child is a matter of chance and none of the parents may be considered responsible for it". Draw a flow chart showing determination of sex of a newborn to justify this statement.
The human animal which has an XY pair of chromosomes is called :
(a) male
(b) hybrid
(c) female
(d) doomed
The person A has only B chromosomes in all its gametes. On the other hand, another person C has chromosome D in half of gametes and chromosome E in the other half of gametes. When chromosomes B and D combine during fertilisation, a female zygote results. On the other hand, combination of B and E chromosomes produces a male zygote.
(a) What are chromosomes (i) B (ii) D, and (iii) E?
(b) Out of B, D and E, which two chromosomes are of the same type?
(c) Which chromosome is smaller in size?
(d) What is the general name of chromosomes such as B and E?
(e) Out of the two persons A and C, which one is (i) male, and (ii) female?
Does the sex of the child depend on the father or it is just a matter of chance? Discuss.
Define the following:
Sex-linked characters
Choose the correct answer:
A single recessive trait, able to express must be on _________
Complete the following sentence with appropriate word:
___________ chromosomes do not take part in sex determination.
What is haplodiploidy?
The chromosomal constitution of a human female can be written as ______
