CAMPBELL BIOLOGY-MASTERING BIO.ACCESS
CAMPBELL BIOLOGY-MASTERING BIO.ACCESS
12th Edition
ISBN: 9780136486787
Author: Urry
Publisher: SAVVAS L
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Chapter 38, Problem 5TYU
Summary Introduction

Introduction: In fertilization fusion of gametes occurs after the two sperm reach the female gametophyte. One sperm fertilizes the egg and form zygote. The second sperm combines with the two polar nuclei and form a triploid (3n) nucleus in the center of central cell of the female gametophyte. This cell will form endosperm. The union of two sperm cells with different nuclei of the female gametophyte is called double fertilization.

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The cells of endosperm have 24 chromosomes. What will be the number of chromosomes in the gametes ? (a) 8 (b) 16 (c) 23 (d) 32
A. What is double fertilization? B. What are the products of double fertilization? C. Explain the following quote “As an individual, the endosperm is unique as it has three ancestors and never leaves any descendants.” What are the three ancestors referred to in this quote? And why endosperm does not leave any descendants?
explain the following:P→ Parental generation.G → Gametes.F1→ First filial generation.F2→ Second filial generationGenotype (F2 (Phenotype (F2) I chose Stem length
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Embryology | Fertilization, Cleavage, Blastulation; Author: Ninja Nerd;https://www.youtube.com/watch?v=8-KF0rnhKTU;License: Standard YouTube License, CC-BY