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प्रश्न
In which livings, female decides the sex? Give two examples.
उत्तर
Living beings in which females decide the sex of the offspring are, birds and moths and butterflies.
APPEARS IN
संबंधित प्रश्न
Explain the mechanism of 'sex determination' in birds. How does it differ from that of human beings?
Fill in the following blank with suitable word :
Genes always work in ................ .
In a human, how many chromosmes are present in an egg which has just been produced by the ovary?
In a human, how many chromosmes are present in a skin cell?
The sex of a child is determined by which of the following?
(a) the length of the mother's pregnancy
(b) the length of time between ovulation and copulation
(c) the presence of and X chromosome in an ovum
(d) the presence of a Y chromosome in a sperm
E is the gene for brown eye colour and an is the gene for blue eye colour. which gene is (1) recessive, and (2) dominant?
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?
________ shows haplo-diploid type of sex-determination.
What is heterogamety ? Explain the mechanism of sex determinatin in Drosophila.
Choose the correct answer:
Chromosomes identical in male and female are called __________
With the help of a chart, explain the method of sex determination in honeybees.
Complete the following sentence with appropriate word:
___________ chromosomes do not take part in sex determination.
XO type of sex determination and XY type of sex determination are examples of ____________.
Identify the female heterogamety from the chromosomal complements given below.
The two versions of a trait (character) which are brought in by the male and female gametes are situated on
Structures present in a cell which is responsible for determination of the sex of a baby is
Sex in honey bee is determined by ______.
What is sex determination? Explain the mechanism of sex determination in the case of birds.
