Biology: The Essentials
3rd Edition
ISBN: 9781260140705
Author: Marielle Hoefnagels
Publisher: Mcgraw-hill Higher Education (us)
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Chapter 30, Problem 5WIO
Summary Introduction
To determine:
The number of primary and secondary spermatocytes produced if a single ejaculation contains about 240 million sperm cells.
Introduction:
The process of the formation of motile spermatozoa from the non-motile primary spermatocyte cell is known as spermatogenesis. The process of spermatogenesis in males initiates at puberty. The primary spermatocyte is diploid in origin and is responsible for the production of motile sperms. The mature sperms or spermatozoa are haploid.
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The shape of radishes may be long (SL/SL), oval (SL/SS), or round (SS/SS), and the color of radishes may be red (CR/CR), purple (CR/CW) or white (CW/CW). If a long, red radish plant is crossed with a round, white plant, what will be the appearance of the F1 and F2 generations?
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Question #3:
In the KeyGene paper, the authors state that it would be useful if pollen from an apomict would
transmit apomixis-inducing genes to the female in the cross (assuming the pollen is viable). Assuming
there was just one gene conferring gametophytic obligate apomixis, and that the two parents are
inbreds, what would be the consequences of such a cross if:
a) The apomixis was a dominant trait? Indicate the genotypes and phenotypes (apomict or non-
apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic
and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female
first (left side) in the parental cross.
b) The apomixis was a recessive trait? Indicate the genotypes and phenotypes (apomict or non-
apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic
and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female
first (left side) in the…
Chapter 30 Solutions
Biology: The Essentials
Ch. 30.1 - Prob. 1MCCh. 30.1 - How is internal fertilization different from...Ch. 30.1 - Prob. 3MCCh. 30.1 - Prob. 4MCCh. 30.2 - What are the relationships among gonads, germ...Ch. 30.2 - Prob. 2MCCh. 30.2 - Prob. 3MCCh. 30.2 - Prob. 4MCCh. 30.2 - Prob. 5MCCh. 30.2 - Prob. 6MC
Ch. 30.3 - Prob. 1MCCh. 30.3 - Where do egg cells develop?Ch. 30.3 - What are the stages of oogenesis?Ch. 30.3 - Prob. 4MCCh. 30.3 - Prob. 5MCCh. 30.3 - Prob. 6MCCh. 30.4 - Describe how three birth control methods work.Ch. 30.4 - Prob. 2MCCh. 30.4 - Describe two reasons that a symptomless STI can be...Ch. 30.5 - Prob. 1MCCh. 30.5 - Prob. 2MCCh. 30.5 - Prob. 3MCCh. 30.5 - Prob. 4MCCh. 30.5 - Prob. 5MCCh. 30.5 - Prob. 6MCCh. 30.5 - Prob. 7MCCh. 30 - Unchanging environments are advantageous to...Ch. 30 - Prob. 2MCQCh. 30 - Prob. 3MCQCh. 30 - Prob. 4MCQCh. 30 - Prob. 5MCQCh. 30 - Prob. 6MCQCh. 30 - Prob. 7MCQCh. 30 - Prob. 8MCQCh. 30 - The umbilical cords function is to a. Transport...Ch. 30 - Prob. 10MCQCh. 30 - Prob. 1WIOCh. 30 - Prob. 2WIOCh. 30 - Prob. 3WIOCh. 30 - Prob. 4WIOCh. 30 - Prob. 5WIOCh. 30 - Prob. 6WIOCh. 30 - Prob. 7WIOCh. 30 - Prob. 8WIOCh. 30 - Prob. 9WIOCh. 30 - Prob. 10WIOCh. 30 - Prob. 11WIOCh. 30 - Prob. 12WIOCh. 30 - Prob. 13WIOCh. 30 - Prob. 14WIOCh. 30 - Prob. 15WIOCh. 30 - Prob. 16WIOCh. 30 - Prob. 17WIOCh. 30 - Some newborn mammals can walk and carry out other...Ch. 30 - Prob. 19WIOCh. 30 - Prob. 1SLCh. 30 - Review Why We Care 30.1 What kinds of studies and...Ch. 30 - Prob. 1PITCh. 30 - Prob. 2PITCh. 30 - Prob. 3PIT
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