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  1. The homozygous dominant taster TT will pass on a dominant T allele to all children, so they will all be tasters.

    3 Answers · Science & Mathematics · 20/11/2012

  2. So the cross is T_W_ X T_ww Since their first child is ttww, you know that actual genotype of the two parents are: TtWw X Ttww. Now, to get another ttww, the probability is 1/4...

    3 Answers · Science & Mathematics · 09/11/2012

  3. 1. Expressivity and penetrance. The gene although present is not being expressed. 2. Some other portion of the taste transduction pathway is broken. Say, for example, a mutation in a "gustducin" gene. http://en.wikipedia.org/wiki...

    1 Answers · Science & Mathematics · 30/10/2012

  4. ...unless you can figure out the biochemistry of why tasters get a different sensation on PTC paper than non-tasters. Perhaps there is a second allele...

    2 Answers · Science & Mathematics · 15/10/2012

  5. If there is a dominant trait, the dominant trait will ALWAYS show up. If there is a recessive and a dominant, the dominant will show up. The only way a recessive trait will show up is if there are two recessive genotypes for that trait. Try taking a...

    2 Answers · Science & Mathematics · 03/10/2012

  6. Tasting is dominant, so both partners have at least one T allele. As both have one non-tasting parent, genotype tt, then both inherited a t allele from the other parent. Both have genotype Tt. Tt x Tt. Both produce T and...

    1 Answers · Science & Mathematics · 21/09/2012

  7. 1. Having no freckles is recessive, so two copies of the allele are required, therefore both parents are ff, and each can only produce a single gamete f, so all the children will be ff and like their parents have no...

    1 Answers · Science & Mathematics · 03/07/2012

  8. ... gene determines the ability to taste a bitter substance called PTC. A scientist accidentally tasted PTC and realized it ...

    5 Answers · Science & Mathematics · 26/06/2012

  9. First understand that an organism can has a pair of alleles. Those alleles can have different genes. A gene can be dominant meaning if the organism has one allele with that gene the gene is "active". Recessive is...

    2 Answers · Science & Mathematics · 22/06/2012

  10. Amazon sells them apparently. If your despite on speed 1 day shipping is available I believe: http://www.amazon.com/PTC-TASTE-PAPER-VIAL-STRIPS/dp/B001D7FF5E

    1 Answers · Science & Mathematics · 12/05/2012

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