Upgrade to remove ads
Chapter 12: Mendel and Heredity
Holt Biology Chapter 12
Terms in this set (55)
the science of heredity and the mechanism by which traits are passed from parents to offspring
what was Gregor Mendel's "job?"
when was Gregor Mendel alive?
where was Gregor Mendel from?
who was the first person to develop rules that accurately predict the patterns of heredity in pea plants?
what is based on Mendel's explanations for the patterns of heredity in garden pea plants?
to mate or breed two individuals
The garden pea plant is a good subject for studying _________ because the plant has contrasting traits, usually self-pollinates, and grows easily.
The garden pea plant is a good subject for studying because the plant has contrasting traits, usually ____-pollinates, and grows easily.
a recognizable inherited feature or characteristic of an organism
on of two or more possible forms of a character; a recognizable feature or characteristic of an organism
the offspring of a cross between parents that have contrasting traits
when pollen from the flower of one plant is carried by insects or by other means to the flower of another plant
male parts (in plants) produce sperm called this
female parts (in plants) produce a(n) egg(s) called this
a cross that is done to study one pair of contrasting traits
Mendel's first experiments used _____ crosses
In how many steps was Mendel's first experiments carried out?
For each of the seven characters that Mendel studied, he found a similar ____ ratio of contrasting traits in the F2 Generation.
Mendelian Theory of Heredity
explains the simple patterns of inheritance. In these patterns, two of several versions of a gene combine & result in one of several possible traits
one of two or more alternative forms of a gene, each leading to a unique trait
how many alleles come from each parent?
when gametes form, each pair of alleles is separated. Only ___ of the pair is passed on to the offspring.
an allele that is fully expressed whenever the allele is present in an individual
an allele that is expressed only when there is no dominant allele present in an individual
because chromosome pairs split up randomly, either one of a pair of ______ _____ might end up in any one gamete.
Law of Segregation
holds that when an organism produces gametes, each pair of alleles is separated and each gamete has an equal chance of receiving either on of the alleles
a specific combination of alleles in an individual
the dectable trait or traits that result from the genotype of an individual
does dominance determine phenotype? (yes or no; what is it?)
describes an individual that carries two identical alleles of a gene, i.e., PP & pp
describes an individual that carries two different alleles of a gene, i.e., Pp
involves 2 characters such as seed color & shape
Law of independent assortment
during gamete formation, the alleles of each gene segregate independently, according to this law
when are genes said to be linked? (when they are close on _____)
used to predict the results of a genetic cross; shows all of the genotypes that could result from a given cross
a monohybrid cross involves parents that have a trait that _____ with the trait of the other parent.
what is the ratio of the possibilities in heterozygous crosses?
the likelihood that a specific event will occur; expressed in mathematical terms
probability formulas can be used to predict the probabilities that specific _____ will be passed on to offspring.
what is the probablity of a specific allele in a gamete?
2/4 or 1/2
what is the probablity in a heterozygous cross?
a diagram that shows the occurrence of a genetic trait in several generations of a family; purbred
an inherited disease or disorder that is caused by a mutation in a gene or by a chromosomal defect.
sex-linkage, dominance, and heterozygosity
the three aspects of inheritance are..? (SDH)
The Mendelian inheritance pattern is rare in nature; other patterns include _____ _____, incomplete dominance, multiple alleles, and codominance
a character that is influenced by more than one gene
a condition in which both alleles for a gene are fully expressed
when an offspring has a phenotype that is intermediate between the traits of its two parents.
genes that have three or more possible alleles
A B O
what blood types do humans have? (generally)
nutrients and temperature
phenotype can be affected by conditions in the environment such as...
during ______, genes that are close together on the same chromosome are less likely to be separated than genes that are far apart.
during meiosis, genes that are close together on the same chromosome are (more or less) likely to be separated than genes that are far apart.
THIS SET IS OFTEN IN FOLDERS WITH...
GACS Biology Chapter 10
Ch 10.2 Genetics
YOU MIGHT ALSO LIKE...
genetics part 1: Mendel's work and Incomplete domi…
genetics part 1: Mendel's work and Incomplete domi…
Science chapter 12
OTHER SETS BY THIS CREATOR
APEng Glossary of Literary & Rhetorical Terms
Wuthering Heights Vocab List APENG 2013
Wordly Wise List 15
Wordly Wise Lesson 11
OTHER QUIZLET SETS
Vertebrate Paleontology Test 1
Ecology Quiz Ch. 1-3
APWH Final age of discovery/Global expansion