Download Aim # 6: How do some plants and animals pass on

Aim # 6: How do some
plants and animals pass on
their genes to their
offspring sexually?
Mini-Lesson Notes:
*Sexual Reproduction: when 2 sex cells
come together to make a new genetically
different organism
*Fertilization: joining of female eggs and
male sperm sex cells
*Zygote: the cell that is formed by
fertilization
Meiosis
Zygote
Mitosis
Name:
Date:
CIS 339, Class ____
Science- Ms. Sowin
Class Work # 6- Sexual Reproduction
Directions: Scroll down and read the questions first to help guide your
reading. Then read the passage and answer the following state
questions in full sentences! This class work will help you on your state
ELA & Science exams!
Most animals and plants reproduce by sexual reproduction. Sexual
reproduction requires two parents whose genetic material is combined in the
offspring. Due to meiosis, each sex cell contains half the genetic information for
the new individual. The female parent produces sex cells called eggs. The male
parent produces sex cells called sperm. The male and female sex cells join
together during fertilization. The resulting cell is called a zygote. Because the
zygote contains genetic material from each parent, it is a totally new cell with its
own genetic makeup. One advantage of sexual reproduction is that it creates
individuals with a new combination of genes- half from each parent, keeping the
population diverse and more likely to survive in changing conditions.
In some plants, sexual reproduction
involves flowers. Flowers are made of
specialized leaves that form petals, and
male and female reproductive organs. The
stamen produce grains of pollen containing
male sex cells- sperm. Wind, insects, or
animals carry pollen to the stigma. A
pollen tube, called a style, grows to the
ovary which have ovules that produce
female sex cells- eggs. The pollen travels
down the style to the ovary, which
contains eggs where fertilization takes
place.
1. What are female and male sex cells called?
Female sex cells are called eggs and male sex cells called sperm.
2. What results from fertilization?
A zygote is the result of fertilization.
3. Hypothesize what would happen
in an orchard if no bees or other
insects lived in the area.
There would be less flowers because
bees pollinate to make more flowers
grow.
4. How is reproduction in
most plants similar to
reproduction in most animals?
Most plants and animals
reproduce by sexual.
5. Where does sexual reproduction take place in plants?
(a) flowers (b) leaf cuttings
(c) horizontal stems
(d) roots
My answer to # 5 is letter…A
6. Which organism reproduces both sexually and asexually?
(a) goldfish (b) black bear
(c) strawberry plant
(d) rattlesnake
My answer to # 6 is letter…
7. Which of the following occurs during sexual reproduction?
(a) Both parents split in half
(b) Only one parent splits in half
© An egg joins with a zygote
(d) An egg cell joins with a sperm cell
My answer to # 7 is letter ….
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