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Questions and Answers
What role does the placenta serve during embryonic development?
What role does the placenta serve during embryonic development?
- It is the structure that initiates hormone secretion.
- It produces sperm cells necessary for reproduction.
- It is responsible for facilitating crossing over during meiosis.
- It connects the mother and developing embryo to provide nutrients. (correct)
Which of the following correctly describes homologous chromosomes?
Which of the following correctly describes homologous chromosomes?
- Chromosomes that are identical in size and shape.
- Chromosomes that only exist in diploid cells.
- Chromosomes that have undergone mutations during meiosis.
- Pairs of chromosomes inherited from both parents. (correct)
What is the main purpose of meiosis in reproduction?
What is the main purpose of meiosis in reproduction?
- To enable the exchange of genes without cellular division.
- To create identical daughter cells for growth.
- To increase the total number of chromosomes in an organism.
- To produce haploid gametes for sexual reproduction. (correct)
Which hormone is primarily secreted by the pituitary gland to stimulate egg and sperm development?
Which hormone is primarily secreted by the pituitary gland to stimulate egg and sperm development?
What does crossing over refer to in meiosis?
What does crossing over refer to in meiosis?
Intersex individuals exhibit characteristics that:
Intersex individuals exhibit characteristics that:
Which of the following statements about haploid cells is accurate?
Which of the following statements about haploid cells is accurate?
Which of the following characteristics develops during puberty?
Which of the following characteristics develops during puberty?
Flashcards
Foetus
Foetus
The stage of development after the embryo, in which the organism's major organs and systems develop.
Haploid
Haploid
A cell with a single set of chromosomes, which is half the number found in a somatic cell.
Meiosis
Meiosis
A type of cell division that produces haploid gametes (sex cells), resulting in genetic diversity.
Crossing Over
Crossing Over
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Homologous Chromosomes
Homologous Chromosomes
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Recombination
Recombination
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Testes
Testes
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Hypothalamus
Hypothalamus
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Study Notes
Reproduction
- Placenta: Structure connecting mother and embryo, nutrients transfer
- Embryo: Developing organism; grows beyond 3cm size
- Testes: Male reproductive glands; produce sperm
- Sperm: Male reproductive cells
- Seminal vesicles + Prostate: Glands that add fluids to sperm
- Primary sexual characteristics: Present from birth
- Secondary sexual characteristics: Develop during puberty
- Intersex: Individuals with characteristics of both sexes
Gamete Formation
- Haploid cell: Contains one set of chromosomes (n)
- Diploid cell: Contains two sets of chromosomes, one set inherited from each parent (2n)
- Homologous chromosomes: Two similar chromosomes, one from each parent
- Meiosis: Cell division creating haploid cells for reproduction
- Meiosis I: Separates homologous chromosomes
- Meiosis II: Separates sister chromatids
- Crossing over: Exchange of genetic material between homologous chromosomes
- Recombination: Reshuffling of genetic material during meiosis
- Polar body: Haploid cell produced during oogenesis, non-functional
Hormonal Regulation
- Hypothalamus: Brain region controlling many bodily functions, including reproduction
- HCG: Hormone indicating pregnancy (used in tests)
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