12 Jun Assignment 1 – A heterozygous pea plant that has yellow
Question
Assignment – 1
Name:
1.A
heterozygous pea plant that has yellow round seeds is allowed to self-fertilize. What
is the probability that an offspring will have, yellow round seeds, green round seeds,
or yellow wrinkled seeds? Show using a Punnett square.
2.A
pea plant is heterozygous for three genes ( Aa,Pp,Yy),axial flower position, purple
color of flower and yellow color of seed. If this plant is self-fertilized, what are the
predicted phenotypes of the offspring and what fraction of the offspring will occur in
each category?
1
3.What
is the probability of two tall (Tt) parents having a tall first child among three
offsprings.?
4.What
is the probability that two of six kids of heterozygous tall parents will be tall?
5. A cross was made between a dwarf plant with white flowers and tall one with red
flowers. The F1 generation had tall plants with red flowers. The F2 generation had the
following plant morphologies in the following numbers:
200 tall plants with red flowers
59 tall plants with white flowers
47 dwarf plants with red flowers
23 dwarf plants with white flowers
Choose the hypothesis that is consistent with the given data and check the goodness
of fit between the data and your hypothesis. Explain your results.
2
6. Explain the type of inheritance pattern that is evident when two pure breeding corn
varieties that have white seeds produce purple seeded corn in the F 1 generation? What is
the F2 ratio when the F1 plants are self fertilized? Illustrate with a Punnett Square.
3
7. Predict the outcome of a cross between a tan seed coat color (AAbb) and gray (aaBB)
seed coat color in lentils; (aabb) forms green coated lentils. Explain how the coat color
morphology is inherited.
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