Reproduction
List the following stages of sexual reproduction in order.
Fertilization, Gametes, Embryo, Zygote.
Gametes, Fertilization, Zygote, Embryo
The length of a population's index finger is an example of what kind of variation?
Continuous
Parent 1: HH (Hairy)
Parent 2: hh (Non-Hairy)
Draw a Punnett Square and list the possible genotype of phenotype combinations.
100% Hh genotype
100% Hairy
What does DNA stand for?
Deoxyribonucleic acid
Is it mitosis or meiosis that occurs during binary fission?
Mitosis
Which form of asexual reproduction describes the process of a cell diving to produce a copy?
Binary Fission
Write an example of a homozygous organism and a heterozygous organisms using the letter "G."
Homozygous: gg or GG
Heterozygous: Gg
Parent 1: Ff (Freckles)
Parent 2: Ff (Freckles)
25% FF
50% Ff
25% ff
So...
75% Freckles
25% Non-Freckles
Explain how the four nucleic bases of DNA bond.
A bonds to T
C bonds to G
What is the role of spindle fibers?
To line up at the ends of the cell, during cell division, and grab and pull apart duplicate chromsomes.
Which organisms, from the list, reproduce asexually?
Humans, Amoebas, Cats, Cows, Bacteria, Sunflowers.
Amoebas, Bacteria, Sunflowers
True of False. A dominant trait is more popular (ie. frequent) in a population.
FALSE
Free Points!
Free Points!
How many chromosomes does a human somatic cell and gamete cell have?
46 and 23
True or False.
Randomization occurs in both mitosis and meiosis.
False
What is the difference between external and internal fertilization? Provide an example of at least 1 animal for both strategies.
Internal: Fertilization occurs inside the body. Ex: Humans, birds, reptiles, insects.
External: Fertilization occurs outside the body. Ex: sponges, marine worms, fish, amphibians.
A variation of a gene is called....
An allele
50% of the offspring are BB (brown eyes)
50% of the offspring are Bb (brown eyes)
What are the genotypyes and phenotypes of the parents?
Parent 1: Bb
Parent 2: BB
Organize the following from largest to smallest in size.
DNA, Chromosome, Cell, Nucleus, Gene, Organism
Organism, Cell, Nucleus, Chromosome, Gene, DNA
Fill in the blank with either: once, twice, or three times
In meiosis chromsomes duplicate __________ but cell division occurs __________________.
once, twice
For a flower, list both the male reproductive parts of the stamen and female reproductive parts of the pistil.
Male: anther, filament
Female: Stigma, Style, Ovary, Ovule
Explain what a genotype and phenotype is
Genotype: genetic makeup of an organism ex: Gg
Phenotype: visible trait of an organism ex: gg
75% of the offspring are Purple (dominant trait)
25% of the offspring are pink (recessive trait)
What are the genotypes of the offspring?
50% Pp
25%pp
A Limestone Fern somatic cell has 160 chromsomes.
How many chromosomes does the Fern have in: Gamete Cells; Cells after mitosis; and Cells after meiosis.
80, 160, 80
Organize the following:
gametes, embryo, adult, zygote, fertilization, randomization.
randomization, gametes, fertilization, zygote, embryo, adult.
or adult could go at the beginning.