In rabbits, albinism is an autosomal recessive condition...

Question

In rabbits, albinism is an autosomal recessive condition caused by the absence of the pigment melanin from skin and fur. Pigmentation is a dominant wild-type trait. Three pure-breeding strains of albino rabbits, identified as strains 1, 2, and 3, are crossed to one another. In the table below, F₁ and F₂ progeny are shown for each cross. Based on the available data, propose a genetic explanation for the results. As part of your answer, create genotypes for each albino strain using clearly defined symbols of your own choosing. Use your symbols to diagram each cross, giving the F₁ and F₂ genotypes. <>

Accepted Answer

Welcome back. Here's our next question. It says a sample of 100 people includes 40 people with the Bombay blood type and 60 people with the A B O blood type. What is the expected frequency of individuals with an A B O blood type? And our answers are a 40% B 50% C 60% or D 70%. Well, we might be sort of misled into thinking this is a more complicated question than it is. Um The Bombay blood type is actually an epis static gene to A B O blood type. People who are um homozygous for the Bombay blood type actually prevents them from expressing A or B antigens on their red blood cells. So, someone who would have the gene for A or B blood type does not express it essentially has a phenotype, almost like O blood type if they're homozygous for the bomb bay gene. However, we don't have to even delve into that because all our sample question is asking us is what's the expected frequency of individuals with an A B O blood type? So all we need to know there is what percent of the population has a B O blood type. And we're given that information right. In our question, it says we have 60 people in our population with a B OS In a total of 100 people in the population. So it's simply 60 divided by 100 Which equals 0.6. And as 1%, that would be 60%,, this was made very easy by the fact that we have a sample of 100 people. So this is a really, really straightforward one that might start to sort of lead you astray. Uh If you get uh drawn up into the epis static gene question, but it's just a simple choice. C 60% as the expected frequency of individuals with A B O blood type. See you in the next video.

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