Mendel and Inheritance Sapling Questions
Why are linked genes often inherited together?
Linked genes are close together on the same chromosome
Genotype (Definition)
The allele combinations an organism has, Rr
Chromosome
A DNA and protein structure that carries and transmits genetic information
Autosome
A chromosome that does not determine sex
Genome
A complete set of genetic information for an organism
Allele
A variation of a gene, B or b
What is an individual that is true-breeding for a particular trait?
An individual that is homozygous for the gene that encodes the trait
What describes an organism with a wild type phenotype?
An organism that has the phenotype that occurs most frequently in natural populations
Which statement describes dominant alleles? -two alleles that are expressed separately and equally -two alleles that blend to create an intermediate phenotype -any allele whose presence can be masked by another allele -any allele that can hide the presence of a different allele
Any allele that can hide the presence of a different allele
Which statement describes recessive alleles? -any allele that can hide the presence of a different allele -any allele whose presence can be masked by another allele -two alleles that are expressed separately and equally -two alleles that blend to create an intermediate phenotype
Any allele whose presence can be masked by another allele
Why does genetic variation not always determine the differences in a given trait between individuals?
Environmental influences can change gene expression
Genotype (example)
The genetic combinations in an organism, a pair of alleles, rr
Phenotype (Definiton)
The physical expression of a gene, Baldness
Which statement describes a phenotype? -the physical trait produced by an organism's genetic makeup -a section of DNA in which the code for a protein is located -the pair of DNA sequences an organism has for a trait -one variation of the code for a protein
The physical trait produced by an organism's genetic makeup
Phenotype (example)
The way an organism looks or functions as determined by its genes, red hair, sickle-cell anemia
What is the offspring of a genetic cross between two true-breeding organisms with different genotypes called?
Hybrid
What idea was developed to explain the physical basis of Mendel's finding that hereditary factors undergo segregation and independent assortment?
The chromosomal theory of inheritance
Which statement describes a genotype? -the physical trait produced by an organism's genetic makeup -the pair of DNA sequences an organism has for a trait -a section of DNA in which the code for a protein is located -one variation of the code for a protein
The pair of DNA sequences an organism has for a trait
How is a true breeding yellow-seeded pea plant different from a hybrid yellow-seeded pea plant?
They have the same phenotype but different genotypes