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Mendel was the first person to succeed in predicting how traits are _________ from generation to generation.
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In peas, both male and female sex cells, which are called _______, are in the same flower.
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Biology 10B Ch 10-11
Mendelian Genetics, Basics of Man Inherit, Complex Inherit, Chromo. Man Heredity
| Question | Answer |
|---|---|
| Mendel was the first person to succeed in predicting how traits are _________ from generation to generation. | Inherited |
| In peas, both male and female sex cells, which are called _______, are in the same flower. | Gametes |
| ________________ occurs when a male gamete fuses with a female gamete in the same flower. | Self-pollination |
| Mendel used the technique called _________________ to breed one plant with another. | Cross-Pollination |
| Mendel studied only one _____ at a time and analyzed his data mathematically. | Trait |
| In individuals with a heterozygous genotype, the _________ allele of a trait is hidden by the expression of the other phenotype. | Recessive |
| In individuals with a heterozygous genotype, the ________ allele of a trait is visible in the phenotype. | Dominant |
| A cross between plants that involves one characteristic is called a __________ cross. | Monohybrid |
| Mendel also performed ________ crosses, which involve two ____ pairs, with pea plants. | Dihybrid, gene |
| When he crossed two pea plants that were heterozygous for bothseed shape (Rr) and for seed color (Yy), he observed a 9:3:3:1 ________________ among the seeds of the offspring. | Phenotypic ratio |
| A Punnett square shows the possible phenotypes and _________ of the offspring. | Genotypes |
| A ________ shows the inheritance of a particular trait over several generations. | Pedigree |
| An organism with two of the same alleles for a particular trait are said to be __________ for that trait. | Homozygous |
| An organism with two different _______ for a particular trait is heterozygous for that trait. | Alleles |
| When alleles are present in the ____________ state, the ________ trait will be observable. | Heterozygous, dominant |
| An individual who is heterozygous for a _________ disorder is called a carrier. | Recessive |
| Examples of recessive genetic disorders in humans are _______________ and ________. | Cystic fibrosis, albinism |
| Caused by altered genes; results in lack of skin pigment | Albinism |
| Recessive genetic disorder; characterized by body's inability to tolerate glactose | Glactosemia |
| Recessive genetic disorder; gene found on chromosome 15;characterized by lack of enzyme that breaks down fatty acids | Tay-Sachs disease |
| Recessive genetic disorder; affects mucus-producing glands, digestive enzymes, sweat glands | Cystic Fibrosis |
| Dominant genetic disorder; affects the nervous system | Huntington's disease |
| Autosomal dominant genetic condition; affects height and body size | Achondroplasia |
| A scientist uses a pedigree to study family history. (T or F) | True |
| A pedigree traces the inheritance of a particular trait through only two generations. (T or F) | False |
| In a pedigree, one who does not express the trait is represented by a darkened square or circle. (T or F) | False |
| In a pedigree, a horizontal line between two symbols shows that these individuals are the parents of the offspring. (T or F) | True |
| Micrograph of chromosomes | Karyotype |
| Abnormal number of chromosomes | Nondisjunction |
| Withdrawl of tissue from the placenta | Chorionic villus sampling |
| Extra chromosome 21 | Down syndrome |
| Protective cap at the end of a chromosome | Telomere |
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Danceman8
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