A. In horses, trotter (T) is dominant over pacer (t). A trotter is mated to a pa

Question

A. In horses, trotter (T) is dominant over pacer (t). A trotter is mated to a pacer, and the offspring is a pacer. What is the genotype of the pacer parent (1pt)?Predict the genotype of the trotter parent (3pts)?Answer in complete sentences (1pt)

B.Trisomy 21, or Down syndrome, results from non disjunction. Describe the data from the figure below. Be sure to include percentage risk as well as age in your description. Use this data to support your opinion as to what age women should really be concerned about the increased rick of offspring developing Down

C.The figure below shows the rates of breast cancer diagnosis at particular ages for males and females. Describe the data in the figure (what does the figure tell you?). Use this data to defend an age in which women should begin testing for breast cancer.

Explanation / Answer

Answer

a) If the Troter (Tt) will mated to Pacer(tt) then only the chances to have an offspring which is Pacer.

The fathr shoud be heterozygous ondition as T is dominant over Pacer.

So the offspring Genotype will be tt.

b) The general occurence of the Down's Syndrome is 0.1% in the population but the risk is directly proprtional to the age of Mother.According to the data given above the risk factor/percentage will be double if the mother attains the age of 30-35 and can be till 0.8% if the women is at 40.so it is always suggested thst the mother should have baby till age of 30 to avoid many types of risk.

c) The graph tells about the risk of breast cancer as the age of the person increases.

At the age after 45-50 it highly suggested for women to begin the diagnosis for Breast Cancer.

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