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Mrs. Buchanan
Mrs. Buchanan - Genetics
| Question | Answer |
|---|---|
| A ________________ shows the combination of alleles that offspring can inherit from parents | Punnett Square |
| A _______________ is a family tree that traces a particular trait over several generations | pedigree |
| How many alleles do you inherit from each parent for any given gene? | one |
| A person who has two recessive alleles for a trait has which type of genotype | homozygous recessive |
| A person who has two dominant alleles for a trait has which type of genotype | homozygous dominant |
| A person who has a dominant allele from one parent and a recessive allele from another parent has which type of genotype | heterozygous |
| Will a person who is heterozygous for a trait that has complete dominance show the dominant or recessive trait | dominant |
| What is the gender of a person who has 2 X chromosomes? | female |
| Which sex chromosomes do males have? | one x and one y |
| What is the genotypic ratio for the offspring of two parents who are both heterozygous for a trait? | 1BB:2Bb:1bb |
| What is the phenotypic ratio for the offspring of two parents who are both heterozygous for a trait? | 3dominant:1 recessive |
| How can two people who both have a dominant trait (such as freckles) have a child with a recessive trait (such as no freckles) | The parents must both have a Heterozygous genotype (Ff) in order to have a child with the recessive genotype |
| How many chromosomes are there in the human genome? | 46 |
| How many chromosomes are there in a sex cell | 23 |
| By which cell division process are gametes produced? | meiosis |
| How many cell divisions are there in mitosis? | 1 |
| How many cell divisions are there in meiosis? | 2 |
| How many daughter cells are produced in mitosis? | 2 |
| How many daughter cells are produced in meiosis? | 4 |
| Are the daughter cells produced in mitosis genetically the same or different from the parent cell? | EXACTLY THE SAME |
| Are the daughter cells produced in meiosis genetically the same or different from the parent cell? | Different |
| Which type of inheritance allows two alleles to be expressed together | incomplete dominance |
| A person who has a recessive allele but does not express that phenotype is a | carrier |
| Chromosomes are made up of long stretches of this molecule that carries the genetic code | DNA |
| The DNA base Adenine pairs only with | Thymine |
| The DNA base Cytosine pairs only with | Guanine |
| The physical appearance of a trait is known as the | phenotype |
| The combination of alleles that an organism has for a certain trait is known as the | genotype |
| The different forms of a gene are called | alleles |
| The two possible alleles for a gene that is expressed through complete dominance are | dominant and recessive |
| Which type of reproduction occurs when gametes combine? | sexual reproduction |
| Which type of reproduction occurs when one parent produces identical offspring? | asexual reproduction |
| The basic unit of inheritance is the | gene |
| If a child has a recessive trait, and his parents have the dominant trait what is the genotype of both of his parents? | Heterozygous |
| Which type of cell division enables organisms to divide asexually? | mitosis |
| Which type of cell division enables the growth, repair, and replacement of cells in human? | mitosis |
| What is the overall function of meiosis | produce gametes |
| A long strand of DNA coiled tightly into packets | chromosome |
| A stretch of DNA that codes for a certain characteristic | gene |
| What does a circle represent on a pedigree? | female |
| What does a square represent on a pedigree? | male |
| In a group of siblings, is the oldest sibling placed farthest to the left or right? | Left |
| A trait that is carried more often in males than females is carried on which chromosome? | x-chromosome |
| If a child has a disease and his parents are normal, is the trait dominant or recessive? | recessive |
| If in every generation, a child who has a disease also has at least one parent with the disease, is the trait dominant or recessive?` | dominant |
| If the men and women in a family are effected by a condition equally, which type of chromosome is the gene that determines that trait carried on? | An autosomal chromosome |
| What is the genotypic ratio if one parent is homozygous dominant and the other is homozygous recessive? | 4Tt:0TT:0tt |
Created by:
mrs.buchanan
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