What Are Germ Cells, Gametes and Types

Q. Which of the following produces isogametes?

1. Human beings
2. Cladophora
3. Cycas
4. Fucus

Q.

Why is mitochondrial DNA inherited only from mother?

Q.

Which among the following is a mismatch?

1. Isogametes - Cladophora

2. Homogametes - Fucus

3. Heterogametes - Homo sapiens

4. Male gamete - Antherozoid

Q. Identify the gametes in the figures A, B and C.

1. A - Heterogametes,
   B - Isogametes,
   C - Homogametes
2. A - Homogametes,
   B - Isogametes,
   C - Heterogametes
3. A - Isogametes,
   B - Heterogametes,
   C - Heterogametes
4. A - Heterogametes,
   B - Heterogametes,
   C - Isogametes

Q.

_________ is an example of a heterogametic oogamous brown alga.

Q. Choose the incorrect statement with respect to sexual reproduction in liverworts.

1. The male and female sex organs may be borne on the same or different thalli.
2. Archegoniophore bears the female sex organ known as the archegonium.
3. Antheridiophore bears the male sex organ on it is called the antheridium.
4. Fertilisation cannot occur when water is present in the surrounding medium.

Q. Match the following (column 1 with
column 2).

1. p-1, q-2, r-3
2. p-2, q-3, r-1
3. p-3, q-1, r-2
4. p-2, q-1, r-3

Q.

Are horsetails homosporous or heterosporous?

Q.

______ is a homogametic filamentous green alga.

1. Fucus

2. Cladophora

3. Volvox

4. Chlamydomonas

Q.

Male gametes are produced more than female gametes in most of the organisms to -

1. Fertilize other gametophytic cells along with egg cell.

2. Compensate loss during transport.

3. Avoid parthenogenesis that result in sterile organisms.

4. Produce more male progeny in the next generation.

Q. The first step in sexual reproduction at the cellular level is:

1. Formation of specialised germ cells
2. Cell division
3. Rapid increase in cell volume
4. Constriction of cytoplasm

Q.

Is isogamete motile?

Q. How many flagella does the sperm of Bryophytes have?

1. 2
2. 3
3. 4
4. 1

Q. Which of the following organism produces isogametes?

1. Cladophora
2. Humans
3. Frog
4. Marchantia

Q.

Which among the following has 23 chromosomes?

1. Spermatogonia

2. Oogonia

3. Secondary oocyte

4. Zygote

Q. Match the following (column 1 with
column 2).

1. p-1, q-2, r-3
2. p-2, q-3, r-1
3. p-3, q-1, r-2
4. p-2, q-1, r-3

Q. The chromosome number are always haploid in

1. gametes
2. seeds
3. embryos
4. zygotes

Q. Male gametes are non-motile and female gametes are motile in majority of the sexually reproducing organisms.

1. False
2. True

Q. Assertion :Conjugation in bacteria is not considered sexual reproduction though there is transfer of genetic material in it. Reason: In conjugation, meiosis, gamete formation and gametic fusion do not occur.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. The first step in sexual reproduction at the cellular level is:

1. Formation of specialised germ cells
2. Cell division
3. Rapid increase in cell volume
4. Constriction of cytoplasm

Q. Which of the following produces isogametes?

1. Fucus
2. Human beings
3. Cladophora
4. Cycas

Q. Gynogenic haploids are produced by using

1. unfertilized ovules
2. fertilized ovules
3. somatic embryo
4. shoot apex

Q. Match the following organism to the type of germ cells they have based on motility.

1. Only males motile
2. Both non-motile
3. Both motile

Q. Sex of the human child is due to

1. autosomes
2. size of egg
3. size of sperm
4. allosomes

Q. How many ova and sperms would be produced from 100 secondary oocytes and 100 secondary spermatocytes, during gametogenesis in humans?

1. 100 ova, 100 sperms
2. 50 ova, 100 sperms
3. 100 ova, 200 sperms
4. 200 ova, 200 sperms

Q. The chromosome numbers are always haploid in

1. Seed
2. Zygote
3. Embryo
4. Gametes

Q. The heterosporous pteridophytes are ______________.

1. Lycopodium and Pteris
2. Selaginella and Psilotum
3. Selaginella and Salvinia
4. Dryopteris and Adiantum

Q. Match the following organism to the type of germ cells they have based on motility.

1. Only males motile
2. Both non-motile
3. Both motile

Q. Identify the gametes in the figures A, B and C.

1. A - Heterogametes,
   B - Isogametes,
   C - Homogametes
2. A - Homogametes,
   B - Isogametes,
   C - Heterogametes
3. A - Isogametes,
   B - Heterogametes,
   C - Heterogametes
4. A - Heterogametes,
   B - Heterogametes,
   C - Isogametes

Q. Gynandromorph is

1. Half male and half female
2. None of the above
3. Male with female traits
4. Female with male traits