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Biology review 4th semester

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  • What is a charactieristic of Oviparous?
    Eggs laid outside the body
  • Are caused by mutations in genes on the X chromosome, one of the two sex chromosomes in each cell.
    X-linked diseases
  • What is a characteristic of viviparous?
    The embryo develops inside the female body
  • Type of reproduction that happens when two parents make gametes that combine at fertilization to produce offspring with gene combination unlike their parents.
    Sexual
  • A reproductive strategy that involves development of a female gamete without fertilization (“female power”).
    Parthenogenesis
  • What is a characteristic of ovoviviparous?
    The embryo develops inside an egg that remains inside the females body
  • Embryonic stage in which three germ layers of the embryo form in a process called histogenesis.
    Gastrulation
  • Starts with a single cell that copies its DNA and then splits into two identical cells. Most bacteria reproduce this way.
    Binary Fision
  • The female part of the flower called the __________
    Pistil
  • One mutated copy of the gene in each cell is sufficient for a person to be affected.
    Autosomal dominant disease
  • Mention an example of an organism that reproduces by fragmentation
    Starfish
  • Embryonic stage in which the neural tube is formed
    Neurulation
  • Two different versions (alleles) of a gene are expressed, and each version makes a slightly different protein
    Codominance
  • Locus is defined as:
    Specific location of a gene
  • In which trimester kidneys start to work.
    1st trimester
  • Embryonic stage that happens in the first 10 days.
    Germination
  • The male part of the flower called the __________
    Stamen
  • In which trimester occurs the formation of heart and blood vessels.
    1st Trimester
  • In which trimester you can Identify the baby’s sex.
    2nd trimester
  • Is a form of asexual reproduction in plants, in which multicellular structures become detached from the parent plant and develop into new individuals that are genetically identical to the parent plant.
    Vegetative reproduction
  • In elephants, allele for long trump(L) is dominant to the allele for no short trum(s). A mother with the genotype Ls and a father with the genotype Ls produce an offspring. What is the percent chance that the offspring will have short trump
    25%
  • Phenotype refers to the ______________________ of an individual.
    Physical appeareance