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Biology 1406 Yoder Test 2
Lamar University / Dr. Yoder / Test 2 / Biology
55
Biology
Undergraduate 1
03/20/2013

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Term
Part of photosynthesis where a photon of light excites electrons in chlorophyll and splits water.
Definition
The non-cylic Light Reaction
Term
Grana consists of stacks of _________ membranes in the cholorplasts
Definition
Thylahoid
Term
A particle of light
Definition
Photon
Term
Liquid interior of cholorplast
Definition
Stroma
Term
Splitting Water
Definition
Hydrolysis
Term
Principle photosynthetic pigment in land plants
Definition
Cholorophyll
Term
What kind of plants save water by opening their stomata at night and closing them during the day?
Definition
Cam
Term
Accessory pigments that give fall leaves their yellow and orange colors?
Definition
Carotenoid
Term
What is part of the non-cyclic electron flow where water is split?
Definition
Photosystem II
Term
Organelle where photosynthesis takes place?
Definition
Chloroplasts
Term
Process by which plants and other organisms harvest energy from the sun to make sugar and O2 from CO2 and water.
Definition
Photosynthesis
Term
What cycle comprises the light independent reactions of photosynthesis?
Definition
Calvin
Term
Reaction involving RuBp and CO2 at the beginning of the Calvin cycle is catalyzed by__________.
Definition
Rubisco
Term
What part of meiosis does crossing over occur in?
Definition
Prophase
Term
After meiosis II each chromosome consists of 1 _______.
Definition
Chromatid
Term
What type of cell division occurs only in the formation of gametes?
Definition
Meiosis
Term
What creates new combinations of alleles on a chromosome?
Definition
Crossing over (2 wds)
Term
Meiosis begins with a diploid cell and results in 4____________.
Definition
haploid daughter cells
Term
Homologous chromosomes are separated to opposite poles of the cell during what stage of meiosis?
Definition
Anaphase I
Term
What kind of chromosomes line up at the equator of the cell during metaphase I of meiosis?
Definition
Homologous
Term
What do homologous chromosomes do during prophase I of meiosis?
Definition
Synapse
Term
Prior to meiosis, a germ cell is __________ in chromosome number.
Definition
Diploid
Term
In oogenesis, meiosis I results in one secondary oocyte and one what?
Definition
Polar Body
Term
What are eggs and sperm?
Definition
Gametes
Term
Division of cytoplasm
Definition
cytokinesis
Term
One of two identical parts of a chromosome after replication of DNA just before mitosis
Definition
Chromatid
Term
DNA molecule and associated proteins.
Definition
Chromosome
Term
A special type of nuclear division that occurs only in the formation of gametes.
Definition
Meiosis
Term
What kind of apparatus consists of microtubules and moves chromosomes around during mitosis?
Definition
Spindle
Term
Stage of mitosis when chromatids are pulled to the opposite ends of the cell.
Definition
Anaphase
Term
Stage of mitosis when the chromosomes relax and the nuclear envelope forms around 2 new nuclei
Definition
Telophase
Term
Nuclear division as it occurs in normal cell division
Definition
mitosis
Term
Where tow identical chromatids are joined at the center of a chromosome.
Definition
centrosome
Term
Found in animal cells, pairs of these migrate to opposite ends of the cell during mitosis.
Definition
Centrioles
Term
Stage of mitosis when the chromosomes condense and the nuclear memberane dissapears.
Definition
prophase.
Term
stage of mitosis when the chromosomes line up on the equator of the cell.
Definition
metaphase
Term
What does the theory of assortment state?
Definition
That each pair of chromosomes and the genes they carry are separated into gametes independently of other pairs during meiosis.
Term
What usually causes Aneuploidy during meiosis?
Definition
Nondisjunction
Term
When the alleles for a trait on both homologous chromosomes are identical.
Definition
Homozygous condition
Term
When one allele is not fully dominant over the other it is called...
Definition
Incomplete Dominance
Term
Theory that every offspring inherits one discrete unit of information for a trait from each parent.
Definition
Theory of segregation
Term
Father of genetics.
Definition
Mendel
Term
Interaction among the products of two or more gene pairs
Definition
Epastasis
Term
Effects on two or more traits due to the expression of alleles at a single locus.
Definition
Pleoitropy
Term
Too many or too few of a chomosome
Definition
Aneuploidy
Term
A test cross that examines only one trait is called what?
Definition
monohybrid
Term
What are usually only expressed in the homozygous condition?
Definition
recessive alleles
Term
Non-sex chromosome
Definition
autosome
Term
What allele masks the expression of the other in heterezygous condition?
Definition
Dominate
Term
What condition is when the alleles for a trait are not identical on the homologous chromosomes?
Definition
Heterozygous
Term
When non-identical alleles are both expressed in the heterozygous condition, it is called______.
Definition
Codominance
Term
What occurs on one of the sex chromosomes?
Definition
Sex-linked genes
Term
What is down syndrome also called?
Definition
Trisomy 21
Term
Different versions of genes
Definition
alleles
Term
Discrete units that code for particular traits.
Definition
Genes
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