$CATEGORY: Science - Khan Academy/8.How do Organisms Reproduce?/8.How do Organisms Reproduce?--Sexual Reproduction

//Multiple Choice

Which of the following is the main purpose of sexual reproduction? {
    ~Growth of an organism
    =Genetic variation in offspring
    ~Repair of damaged tissues
    ~Elimination of diseases
}

What are gametes? {
    ~Diploid cells involved in reproduction
    =Haploid cells involved in reproduction
    ~Cells involved in repair and growth
    ~None of the above
}

The male gamete in humans is called\: {
    ~Ovum
    ~Zygote
    =Sperm
    ~Embryo
}

Which of the following processes restores the diploid number of chromosomes in sexual reproduction? {
    ~Meiosis
    =Fertilization
    ~Mitosis
    ~Pollination
}

In flowering plants, male gametes are found in\: {
    ~Ovary
    ~Ovule
    =Pollen grains
    ~Sepals
}

Which of the following structures produces female gametes in humans? {
    ~Testes
    =Ovary
    ~Uterus
    ~Fallopian tube
}

What is the term for the fusion of male and female gametes? {
    ~Pollination
    =Fertilization
    ~Germination
    ~Regeneration
}

In humans, the number of chromosomes in a gamete is\: {
    =23
    ~46
    ~92
    ~21
}

Which of the following is a characteristic of sexual reproduction? {
    ~Offspring are genetically identical to parents
    =Offspring show variations from parents
    ~Only one parent is required
    ~It occurs only in animals
}

Which type of cell division produces gametes? {
    ~Mitosis
    ~Binary fission
    =Meiosis
    ~Budding
}

//True or False

Sexual reproduction results in offspring that are genetically identical to the parents. {F}

Gametes are haploid cells that contain half the number of chromosomes compared to somatic cells. {T}

Fertilization restores the diploid number of chromosomes in an organism. {T}

In humans, the male gamete is called the ovum. {F}

Meiosis is the type of cell division responsible for producing gametes. {T}

Pollination is the fusion of male and female gametes in flowering plants. {F}

The zygote formed after fertilization is diploid. {T}

In humans, fertilization occurs in the uterus. {F}

Pollen grains contain the male gametes in flowering plants. {T}

Sexual reproduction increases genetic diversity in a population. {T}

//Fill in the blanks

The process of fusion of male and female gametes is called ________. {
    ~Pollination
    =Fertilization
    ~Germination
    ~Budding
}

Male gametes in humans are produced in the ________. {
    =Testes
    ~Ovaries
    ~Uterus
    ~Prostate gland
}

The female gamete in humans is called ________. {
    ~Zygote
    ~Sperm
    =Ovum
    ~Embryo
}

The type of cell division that forms gametes is ________. {
    ~Mitosis
    ~Binary fission
    =Meiosis
    ~Budding
}

The structure in flowering plants that contains male gametes is ________. {
    ~Ovary
    ~Sepals
    =Pollen grain
    ~Petals
}

In humans, fertilization occurs in the ________. {
    ~Uterus
    ~Ovary
    =Fallopian tube
    ~Cervix
}

The zygote formed after fertilization is ________. {
    ~Haploid
    =Diploid
    ~Triploid
    ~Polyploid
}

In humans, the number of chromosomes in a zygote is ________ {
    ~23
    =46
    ~92
    ~21
}

The transfer of pollen from anther to stigma is called ________. {
    ~Fertilization
    =Pollination
    ~Germination
    ~Propagation
}

In sexual reproduction, offspring inherit traits from ________. {
    ~One parent
    =Both parents
    ~The environment
    ~The zygote only
}

//Numericals

How many chromosomes are present in a human gamete? {
    =23
    ~46
    ~92
    ~21
}

How many chromosomes are present in a zygote in humans? {
    ~23
    =46
    ~92
    ~21
}

How many male gametes are produced from one spermatocyte during meiosis? {
    ~1
    ~2
    ~3
    =4
}

How many female gametes (ova) are produced from one oocyte during meiosis? {
    =1
    ~2
    ~3
    ~4
}

How many ovules are required to produce 10 seeds in a plant? {
    ~5
    =10
    ~15
    ~20
}

If a pollen grain contains 8 chromosomes, how many chromosomes will be present in the zygote? {
    ~4
    ~8
    =16
    ~32
}

If the diploid chromosome number of an organism is 20, how many chromosomes will be present in its gametes? {
    =10
    ~20
    ~30
    ~40
}

In humans, how many sperm cells are produced from 5 primary spermatocytes? {
    ~10
    ~15
    =20
    ~25
}

If a flower has 12 ovules, how many seeds will be formed after successful fertilization? {
    ~6
    =12
    ~18
    ~24
}

If 40 pollen grains are produced by a flower, how many male gametes will be formed? {
    ~20
    ~40
    =80
    ~160
}

//Match the following

Match the following items from Column A with their correct corresponding options from Column B\:
{
=Male gamete -> Sperm
=Female gamete -> Ovary
=Site of fertilization in humans -> Fallopian tube
=Gamete production organ in females -> Ovary
}


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