LIFE: THE SCIENCE OF BIOLOGY
11th Edition
ISBN: 9781319145125
Author: Sadava
Publisher: MAC HIGHER
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Chapter 30.1, Problem 2R
Summary Introduction
To review:
The differentiation between radial symmetry and bilateral symmetry, protostome and deuterostome, and diploblastic and triploblastic.
Introduction:
Symmetry is defined as the repetitive body parts of plants and animals in a very ordered fashion. Different types of symmetry are exhibited by animals, such as asymmetry, radial, biradial, bilateral, and spherical. Depending on embryonic development, metazoans can be differentiated into protostomes and deuterostomes.
Protostomes are primarily primitive invertebrates, whereas deuterostomes include echinoderms and chordates. Germ layers are primarily layers of cells that are formed during embryogenesis. Some of the organisms have two germ layers and some have three and are diploblastic and triploblastic, respectively.
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The Snapdragon is a popular garden flower that comes in a variety of colours, including red, yellow, and orange. The genotypes and associated phenotypes for some of these flowers are as follows:
aabb: yellow
AABB, AABb, AaBb, and AaBB: red
AAbb and Aabb: orange
aaBB: yellow
aaBb: ?
Based on this information, what would the phenotype of a Snapdragon with the genotype aaBb be and why?
Question 21 options:
orange because A is epistatic to B
yellow because A is epistatic to B
red because B is epistatic to A
orange because B is epistatic to A
red because A is epistatic to B
yellow because B is epistatic to A
A sample of blood was taken from the above individual and prepared for haemoglobin analysis. However, when water was added the cells did not lyse and looked normal in size and shape. The technician suspected that they had may have made an error in the protocol – what is the most likely explanation?
The cell membranes are more resistant than normal.
An isotonic solution had been added instead of water.
A solution of 0.1 M NaCl had been added instead of water.
Not enough water had been added to the red blood cell pellet.
The man had sickle-cell anaemia.
A sample of blood was taken from the above individual and prepared for haemoglobin analysis. However, when water was added the cells did not lyse and looked normal in size and shape. The technician suspected that they had may have made an error in the protocol – what is the most likely explanation?
The cell membranes are more resistant than normal.
An isotonic solution had been added instead of water.
A solution of 0.1 M NaCl had been added instead of water.
Not enough water had been added to the red blood cell pellet.
The man had sickle-cell anaemia.
Chapter 30 Solutions
LIFE: THE SCIENCE OF BIOLOGY
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