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Genetic Question Sample Essay

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Below is an essay on "Genetic Question Sample" from Anti Essays, your source for research papers, essays, and term paper examples.

Test 1

Section A

1. In pea plants, inflated pods (R) are dominant to constricted pods ( r ). Which of the following crosses represents a testcross?
A. RR x RR B. RR x Rr C. RR x rr D. Rr x Rr

2. In humans, long eyelashes are dominant (L). Short eyelashes are recessive. What is the probable phenotypic ratio if two heterozygous individuals for short and long eyelashes are married?
  A. 100% long eyelashes C. 75% long, 25% short
  B. 75% short, 25% long D. 100% short

3. Varieties of plants or animals that when crossed with each other always produce offspring that are identical to themselves are:
A. true-breeding                                         B. heterozygous
C. homozygous                                             D. F1 hybrids                           E. A and C

4. How many different kinds of gametes can be produced by an individual with the genotype AABbCCddEeFf?

A. 2       B. 4       C. 8       D. 16     E. 64       F. None of these choices

5. If two or more forms of the same gene exist, the different forms are called:
A. incomplete dominance.                             B. penetrance and expressivity.
C. pleiotrophic.                                           D. alleles.                                           E. dihybrid.

6. If a corn plant has a genotype of Ttyy, what are the possible genetic combinations that could be present in a single grain of pollen from this plant?
A Ty, ty                                                       B TY, ty
C TY, Ty, ty                                                 D Ty, ty, tY, TY

7. In carrier pigeons there is a rare inherited condition that causes the death of the chicks before hatching. In order for this disease to be passed from generation to generation there must be parent birds that
A are heterozygous for the disease.             B have the disease themselves.
C produce new mutations for this disease.   D are closely interbred.

8. You cross two mouse strains...

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