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Ch. 11 The first genetiicist: Mendel and his discoveries.
Terms in this set (12)
Which of the following was not one of the Mendel's main interferences from his research?
Genes and lenghts of DNA
What is the term for an observable trait of an organism?
The seeds in a pod of one of Mendel's pea plant are:
Each the result of a separate fertilization event
Mendel postulated that individuals have genetic elements that exist in pairs, which determine a single phenotype. What do we now know these pairs of elements to be?
Two alleles of a gene on homologous chromosomes
Mendel wanted to make sure his starting plants bred true, meaning the:
Phenotypes of the offspring in each generation were always the same as the parents
The D gene controls pea plant height. The DD and dd genotypes confer tall and dwarft phenotypes, respectively. What is the relationship between D and d?
They are alleles of the same gene.
Beforte Mendel, people had observed inheritance of dominant and recessive traits by following many generations of plants and animals. What was the different about Mendel's work?
He kept careful count of his results, including mathemtical analysis.
Mendel crossed true-breeding pea plants and found the dominant trait always appeared in the F1 generation, but it appearedin a __________ratio of dominant to recessive in the F2 generation.
A and a are dominant and recessive alleles, respectively, of the same gene. Which genotype(s) would result in an individual with the dominant phenotype?
AA and Aa
A and a are dominant and recessive alleles, respectively, of the same gene. Which genotype(s) would result in an individual with the recessive phenotype?
Cystic fibrosis (CF) is caused by a recessive allele. A child has CF, even though neither of his parents has CF. Which of the following describes the genotypes of the parents?
They are both heterozygous for the CF gene
Cystic fibrosis (CF) is caused by a recessive allele. A child has CF, even though neither of his parents has CF. What is the probability the unaffected child is heterozygous?
THIS SET IS OFTEN IN FOLDERS WITH...
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