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Chapter 12: Q. 6 (page 326)

Which is one of the seven characteristics that Mendel observed in pea plants?

a. flower size

b. seed texture

c. leaf shape

d. stem color

Short Answer

Expert verified

The correct answer is option b

Step by step solution

01

Step 1. Introduction

Hybridisation experiment was conducted on Garden pea plant by Mendel and he selected 7 pairs of contrasting characters.

02

Step 2. Explanation of the correct option

Option b is correct because Mendel selected seven pairs of contrasting characters of pea plants for his experiment which include pea color, pod shape, pod color, flower color, plant height, and position of flowers.

03

Step 3. Explanation of the incorrect options 

Option a is incorrect because flower size was not selected by Mendel for his experiment.

Option c is incorrect because the leaf shape was not selected by Mendel for his experiment.

Option d is incorrect because stem color was not selected by Mendel for his experiment.

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Most popular questions from this chapter

Consider a cross to investigate the pea pod texture trait, involving constricted or inflated pods. Mendel found that the traits behave according to a dominant/recessive pattern in which inflated pods were dominant. If you performed this cross and obtained 650 inflated-pod plants in the F2 generation, approximately how many constricted-pod plants would you expect to have?

a. 600

b. 165

c. 217

d. 468

Calculate the probability of selecting a heart or a face card from a standard deck of cards. Is this outcome more or less likely than selecting a heart suit face card

The ABO blood groups in humans are expressed as the IA, IB, and i alleles. The IA allele encodes the A blood group antigen, IB encodes B, and i encodes O. Both A and B are dominant to O. If a heterozygous blood type A parent (IAi) and a heterozygous blood type B parent (IBi) mate, one-quarter of their offspring will have AB blood type (IAIB) in which both antigens are expressed equally. Therefore, ABO blood groups are an example of:

  1. multiple alleles and incomplete dominance

  2. codominance and incomplete dominance

  3. incomplete dominance only

  4. multiple alleles and codominance

Use a Punnett square to predict the offspring in a cross between a dwarf pea plant (homozygous recessive) and a tall pea plant (heterozygous). What is the phenotypic ratio of the offspring?

The ABO blood groups in humans are expressed as the I A , I B , and i alleles. The I A allele encodes the A blood group antigen, I B encodes B, and i encodes O. Both A and B are dominant to O. If a heterozygous blood type A parent (I A i) and a heterozygous blood type B parent (I B i) mate, one quarter of their offspring will have AB blood type (I A I B ) in which both antigens are expressed equally. Therefore, ABO blood groups are an example of:

a. multiple alleles and incomplete dominance

b. codominance and incomplete dominance

c. incomplete dominance only

d. multiple alleles and codominance
See all solutions

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