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Heterozygotes who though they don't show any phenotypic affects, could pass the recessive allele on to the next generation
When one trait is dominant and the other is recessive
Two parents give rise to offspring that have unique combinations of genes inherited from the two parents.
Infoldings of an inner membrane
A netlike array of protein filaments that maintain the shape of the nucleus by mechanically supporting the nuclear envelope
A region often located near the nucleus and is considered a 'microtubule organization center'
fluid outside chloroplast DNA
Multicellular haploid that's named for its production by mitosis of haploid gametes.
Organism's genetic makeup, outward appearance does not display the full picture
Type of DNA replication in which the replicated double helix consists of one old strand, derived from the parental molecule, and one newly made strand.
When subunits run in opposite directions
When an incorrect segment of nucleotides is incorrect, they're cut out and refilled.
Synthesizes discontinuously as a series of segments
aneuploidy involving a missing chromosome
States that two alleles of a heritable character segregate from one another during gamete formation & end up with different gametes.
Each variant for a character of an individual.
All other chromosomes, humans have 46.
When the two alleles affect the phenotype in seperate, distinguishable ways
Outer surface lacks ribosomes. Synthesis of lipids, metabolism of carbs, detox of poison, and storage of calcium.
When an error is missed, other enzymes remove and replace incorrectly paired nucleotides.
A group of genetically identical individuals.
Tiny complexes that make proteins according to instructions from the genes, all cells have these. Made of RNA and protein.
Mating of two variants.
Contain a single set of chromosomes. Each has a haploid number of chromosomes. Sex cells.
DNA molecules that contain no genes used to protect organism's genes from cutting too far.
Breeding an organism with an unknown genotype w/ one with homozygous recessive, in order to determine the genotype of the unknown
Family tree describing the traits of parents & children across the generations
Specialized structure in the nucleus that consist of chromosomal regions containing rRna genes and ribosomal protein. The site of rRna synthesis and ribosomal subunit assembly.
Catalyses the synthesis of new DNA by adding nucleotides to the preexisting chain.
An additive effect of 2 or more genes on a single phenotype character.
Organism that has 2 different alleles for a gene
Contains most of the genes in the eukaryotic cell.
Many factors including genetics, and the environment collectively affect phenotype
Only produce the same variety as the parent organism, even over many generations.
The phenotype for a character most commonly observed in a natural population
Diagram used for predicting the allele composition of offspring
A warehouse for receiving, sorting, shipping and manufacturing products of the ER.
Exists at the point where a cross-over has occured.
Site of cellular respiration, metabolic process that uses oxygen to produce ATP by extracting energy from sugars, fats, and other fuels.
Enzymes that untwist the double helix at the replication forks, separating the two parental strands and make them available as template strands.
Proteins built into the plasma membrane. Transmit signals between the ECM and cytoskeleton and indicate changes.
Variation in phenotype depending on whether an allele came from the male or the female
2nd type of life, includes both diploid & haploid stages that are multicellular.
Inside the centrosome, consist of 9 sets of triplet microtubules arranged in a ring.
Hollow rods constructed from tubulin, grow in length by adding tubulin dimers.
Alternative versions of a gene
Solid rods, short, and can for structural networks
At the boundary of every cell. Functions as a selective barrier that allows passage of enough oxygen, nutrients, and wastes to service the entire cell.
The purpose of meiosis I, reduces the chromosomes in half.
States that each pair of alleles segregates independently of each other pair of alleles during gamete formation
Membrane enclosed structures within eukaryotic cells.
When an abnormal gamete unites with a normal gamete, the zygote will also have an abnormal number of a particular chromosome
Inside all cells, semifluid, jellylike substance in which all subcellular components are suspended.
Any cell with 2 chromosome sets, doesn't include sex cells.
One of a family of closely related organelles that includes chloroplasts, chromoplasts, amyloplasts, photosynthesis.
When neither allele is completely dominant & their phenotype is a mix between the two alleles (eg. pink flowers from white and red parents)
Extracellular structure of plant cells. distinguishes them from animal cells. protects plant cells, maintains its shape, and prevents excessive uptake of water.
An offspring whose phenotype differs from that of the true-breeding P generation parents. Also refers to the phenotype itself.
The initial nucleotide chain that is produced during DNA synthesis is a short stretch of RNA. Starts a complimentary RNA chain so that DNA synthesis can continue.
The lesser condensed form of chromatin that can be transcribed
flattened, interconnected sac in chloroplast
Includes the nuclear envelope, the ER, golgi apparatus, lysosomes, various types of vesicles and vacuoles, and the plasma membrane.
Proteins that have carbs covalently bonded to them.
Coded information in the form of hereditary units.
aneuploidy involving an extra/third chromosome
X & Y chromosomes. They determine an individual's sex. (Females=XX, Males=XY)
1/3 types of animal cell junction
An mishap in the distribution of chromosomes by the meiotic spindle which the members of homologs dont move apart properly or don't seperate during meiosis II
Eukaryotic chromatin that remains highly compact during interphase and is genetically not transcribed
Complex of DNA and protein, fits into the nucleus through an elaborate, multilevel packing system.
proteins responsible for the first level of DNA packing in chromatin.
1/3 types of animal cell junction
Occurs while replicated homologs are paired during meiosis 1.
Perforate cell walls. Membrane-line channels filled with cytoplasm.
Studded with ribosomes on the outer surface of the membrane. Proteins attach to this.
The phenotypic expression of a gene at one locus alters that of a gene at a second locus
The interior of a cell.
An extensive network of membrane that accounts for more than half the total membrane in many euk. cells.
Humans have 46. Includes all cells of the body except gametes & their precursors.
stacks of thylakoids
A gene with multiple phenotypic affects
Where replication of DNA begins.
Bind to the unpaired DNA strands after parental strands separate, keeping them from reconnecting
Genotype that is associated with a range of phenotypic possibilities due to environmental influences
Gamete cells require this, reduces # of sets of chromosomes from 2 to 1 in gametes.
Found in plants and algae, sites of photosynthesis
A long cellular appendage specialized for locomotion
Reproductive cells which are the vehicles that transmit genes from one generation to the next.
Display of condensed chromosomes arranged in pairs. Used to screen for defective chromosomes associated with certain congenital disorders.
At the ends of replication bubbles, y-shaped region where particular strands of DNA are being unwound
Organism's outward appearance/observable traits
an animal's version of a cell wall. Contains glycoproteins and other carb. molecules/
2nd filial generation
A gene located on the X chromosome
1/3 types of animal cell junction
Two chromosomes that have the same length, centromere, position, & staining pattern.
Large vesicles derived from the ER & golgi apparatus, integral part of cell's endomembrane system.
Sacs made of membrane, tiny.
Larger than microfilaments but shorter than microtubules. Specialize in bearing tension.
Characters that don't vary categorically (eg. height, skin color)
A gene's specific location along the length of a chromosome.
encloses the nucleus, separating its contents from the cytoplasm. double membrane, lined by nuclear lamina.
Individual chromosomes that carry genes derived from 2 different parents.
Produced by mitotic division of a zygote, multicellular diploid.
genetic map based on recombination frequencies
Genes located on the X chromosome
ordered list of genetic loci along a chromosome
The inactive X in each cell of a female condenses into a compact object.
During Prophase I duplicated homologs are connected to each other via the synaptonemal complex. Doesn't occur in Mitosis.
1st filial generation
Membranous sac of hydrolytic enzymes that animal cells use to digest macromolecules.
Specialized metabolic compartment bonded by a single membrane. Cooperates with chloroplasts and mitochondrion in certain metabolic functions
Synthesizes completely using just one primer
Short appendage used for movement
A framework of protein fibres extending throughout the nuclear interior
During Prophase I chromosomes attach to their non-sister chromatid counterparts and exchange DNA segments, doesn't occur in Mitosis.
A network of fibers extending through the cytoplasm
A single individual is the sole parent & passes copies of all its genes to its offspring without the fusion of gametes.
Catalyses the lengthening of telomeres compensating for the shortening during DNA replication.
Organism that has a pair of identical alleles for a gene
Genes located near each other on the same chromosome, they tend to be inherited together
2nd compartment of the mitochondrion, enclosed by the inner membrane. contains many different enzymes as well as mitochondrial DNA and ribosomes.
Protein that breaks, swivels, and rejoins DNA strands. During DNA replication, helps relieve strain in the double helix ahead of rep. fork.
Parental generation.

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