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WorksheetsChapter 9.1 Mendel's Legacy Section Review
Total questions: 24
Worksheet time: 20mins
Mendel obtained plants that were true-breeding for particular traits by
Growing plants from the seeds of the other plants that showed that trait
Discarding plants that showed other traits
Allowing plants to self-pollinate for several generations
Allowing plants to cross-pollinate for one generation
When Mendel crossed a strain of tall pea plants with a strain of short pea plants, he observed that all of the plants in the F1 generation were tall. This suggests that
The tall trait was controlled by a dominant factor
The short trait was controlled by a dominant factor
Both traits were controlled by a recessive factor
The strain of short plants was not capable of pollinating the strain of tall plants
A cross between true-breeding green-podded pea plants and true-breeding yellow-podded pea plants produces only green-podded plants. When the F1 generation is allowed to self-pollinate, the F2 generation consists of
Only green-podded plants
Only yellow-podded plants
About three-quarters yellow-podded plants and one-quarter green-podded plants
About three-quarters green-podded plants and one-quarter yellow-podded plants.
When alleles for different characteristics are on separate chromosomes, they are distributed to gametes independently. This observation is summarized by the law of
cross-pollination
segregation
independent assortment
molecular genetics
The diagram below shows the assortment of two pairs of homologous chromosomes during meiosis. One pair has a gene for flower color (R allele=red, r allele=white). The other pair has a gene for seed color (B allele=brown, b allele=gray). FILL IN THE FIRST 2 BLANKS
r;B
R;b
R;B
r;b
The diagram below shows the assortment of two pairs of homologous chromosomes during meiosis. One pair has a gene for flower color (R allele=red, r allele=white). The other pair has a gene for seed color (B allele=brown, b allele=gray). FILL IN THE SECOND 2 BLANKS
r;b
R;B
R;b
r:b
The diagram below shows the assortment of two pairs of homologous chromosomes during meiosis. One pair has a gene for flower color (R allele=red, r allele=white). The other pair has a gene for seed color (B allele=brown, b allele=gray). FILL IN THE THIRD 2 BLANKS
R;b
r:B
r;b
R;B
The diagram below shows the assortment of two pairs of homologous chromosomes during meiosis. One pair has a gene for flower color (R allele=red, r allele=white). The other pair has a gene for seed color (B allele=brown, b allele=gray). FILL IN THE LAST 2 BLANKS
r;b
R;B
r:B
R;b
The science of heredity and of the mechanisms by which traits are passed from parent to offspring.
(a)
The passing of genetic traits from parent to offspring.
(a)
A genetically determined variant of a characteristic.
(a)
The transfer of pollen from the male reproductive structures (the anthers) to the tip of the female reproductive structure (the pistil) of a flower in angiosperms or to the ovule in gymnosperms.
(a)
The transfer of pollen grains from an anther to the stigma of the same flower or to the stigma of another flower on the same plant.
(a)
A reproductive process in which pollen from one plant is transferred to the stigma of another plant.
(a)
Describes organisms or genotypes that are homozygous for a specific trait and this always produce offspring that have the same phenotype for that trait.
(a)
(True-breeding) Parental generation, the first two individuals that mate in genetic cross.
(a)
The first generation of offspring obtained from an experimental cross of two organisms.
(a)
The second generation of offspring obtained from an experimental cross of two organisms; the offspring of the F1 generation.
(a)
Describes the allele that is fully expressed when carried by only one of a pair of homologous chromosomes.
(a)
Describes a trait or an allele that is expressed only when two recessive alleles for the same characteristic are inherited.
(a)
Mendel's law that states that the pairs of homologous chromosomes separate in meiosis so that only one chromosome from each pair is present in each gamete.
(a)
The law that states that genes separate independently of one another in meiosis.
(a)
The study of the structure of nucleic acids and the function and regulation of genes.
(a)
One of the alternate forms of a gene that governs a characteristic, such as hair color.
(a)
