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Related Concept Videos

Nature and Nurture01:10

Nature and Nurture

Many human characteristics, like height, are shaped by both nature—in other words, by our genes—and by nurture, or our environment. For example, chronic stress during childhood inhibits the production of growth hormones and consequently reduces bone growth and height. Scientists estimate that 70-90% of variation in height is due to genetic differences among individuals, and 10-30% of variation in height is due to differences in the environments that individuals experience, such as differences...
Non-nuclear Inheritance01:29

Non-nuclear Inheritance

Most DNA resides in the nucleus of a cell. However, some organelles in the cell cytoplasm⁠—such as chloroplasts and mitochondria⁠—also have their own DNA. These organelles replicate their DNA independently of the nuclear DNA of the cell in which they reside. Non-nuclear inheritance describes the inheritance of genes from structures other than the nucleus.
Nondisjunction01:29

Nondisjunction

During meiosis, chromosomes occasionally separate improperly. This occurs due to failure of homologous chromosome separation during meiosis I or failed sister chromatid separation during meiosis II. In some species, notably plants, nondisjunction can result in an organism with an entire additional set of chromosomes, which is called polyploidy. In humans, nondisjunction can occur during male or female gametogenesis and the resulting gametes possess one too many or one too few chromosomes.
Nondisjunction01:29

Nondisjunction

During meiosis, chromosomes occasionally separate improperly. This occurs due to failure of homologous chromosome separation during meiosis I or failed sister chromatid separation during meiosis II. In some species, notably plants, nondisjunction can result in an organism with an entire additional set of chromosomes, which is called polyploidy. In humans, nondisjunction can occur during male or female gametogenesis and the resulting gametes possess one too many or one too few chromosomes.
Nondisjunction01:21

Nondisjunction

Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate correctly and move to the opposite poles of the cells. This produces daughter cells with abnormal chromosome numbers.  Nondisjunction is common during anaphase I or anaphase II of meiosis.  Mutations in synaptonemal complex proteins that attach homologous chromosomes increase the chances of nondisjunction in anaphase I of meiosis I. In contrast, mutations in topoisomerases and condensins that hold sister...
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Anorexia Nervosa

Anorexia nervosa is a complex and severe eating disorder characterized by an intense fear of weight gain, an unrelenting pursuit of thinness, and a distorted body image. It often leads to dangerously low body weight relative to an individual's age and height. This disorder is marked by significant physical and psychological consequences, making it one of the most life-threatening psychiatric illnesses.
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Non-radioactive in situ Hybridization Protocol Applicable for Norway Spruce and a Range of Plant Species
11:56

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Published on: April 17, 2009

Norin-10-based semidwarfism.

M D Gale, C N Law

    Basic Life Sciences
    |March 1, 1976
    PubMed
    Summary
    This summary is machine-generated.

    Many wheat varieties are insensitive to gibberellic acid, a trait controlled by specific genes. This study explores the genetic control and agricultural potential of these height-reducing genes in wheat.

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    Area of Science:

    • Plant genetics
    • Agricultural science
    • Molecular biology

    Background:

    • Short-strawed wheat varieties, crucial for modern agriculture, often exhibit reduced sensitivity to gibberellic acid.
    • This insensitivity is linked to specific genes controlling plant height.

    Purpose of the Study:

    • To elucidate the genetic basis of gibberellic acid insensitivity in wheat.
    • To describe the relationship between Gai genes and Rht genes involved in height reduction.
    • To assess the agricultural significance and potential of these genes.

    Main Methods:

    • Genetic analysis of wheat varieties with differing heights and gibberellic acid responses.
    • Comparison of gene expression patterns related to height regulation.
    • Agronomic evaluation of wheat lines carrying specific height-reducing genes.

    Main Results:

    • Characterization of the genetic control underlying gibberellic acid insensitivity.
    • Detailed description of the interactions between Gai and Rht genes.
    • Identification of wheat genotypes with desirable agronomic traits.

    Conclusions:

    • Gibberellic acid insensitivity is genetically controlled and linked to key height-reducing genes in wheat.
    • Understanding these genes is vital for breeding wheat with improved yield and agronomic characteristics.
    • The Rht and Gai genes offer significant potential for enhancing wheat agriculture globally.