Std. 7 Vocabulary
Terms in this set (35)
genetics) either of a pair (or series) of alternative forms of a gene that can occupy the same locus on a particular chromosome and that control the same character
a threadlike strand of DNA in the cell nucleus that carries the genes in a linear order
Describing two or more alleles that are equally dominant
genetic inability to distinguish differences in hue ; Reduced ability to discriminate between colors, especially shades of red and green. Usually hereditary.
the most common congenital disease; the child's lungs and intestines and pancreas become clogged with thick mucus; caused by defect in a single gene; no cure is known)
hybridization using two traits with two alleles each
an allele that produces the same phenotype whether its paired allele is identical or
mongolism: a congenital disorder caused by having an extra 21st chromosome; results in a flat face and short stature and mental retardation
a segment of DNA that is involved in producing a polypeptide chain; it can include regions preceding and following the coding DNA as well as introns between the exons; it is considered a unit of heredity)
the ordering of nucleotides in DNA molecules that carries the genetic information in living cells
The variety of different types of genes in a species or population.
the branch of biology that studies heredity and variation in organisms
a group of organisms sharing a specific genetic constitution
genotype means genetic make up. it can give the information about the parents wether they were homozygous or heterzygous
having dissimilar alleles at corresponding chromosomal loci
having the same evolutionary origin but not necessarily the same function; corresponding or similar in position or structure or function or characteristics
having identical alleles at corresponding chromosomal loci
A situation where neither gene dominates the other and both exercise an influence on the individual. Also called co-dominance, & blended character
the appearance of the chromosomal makeup of a somatic cell in an individual or species (including the number and arrangement and size and structure of the chromosomes
Two laws summarizing Gregor Mendel's theory of inheritance. The Law of Segregation states that each hereditary characteristic is controlled by two `factors' (now called alleles), which segregate and pass into separate germ cells. The Law of Independent Assortment states that pairs of `factors' segregate independently of each other when germ cells are formed. See independent assortment; linkage.
hybridization using a single trait with two alleles
The existence of more than two alleles at a locus in a population
something that comes into existence as a result;
the descendants of one individual
what an organism looks like as a consequence of the interaction of its genotype and the environment
the external appearance or expression of the genetic make up
a genetic disorder of metabolism; lack of the enzyme needed to turn phenylalanine into tyrosine results in an accumulation of phenylalanine in the body fluids which causes various degrees of mental deficiency
A trait affected by many genes, no single gene has an over-riding influence
A tool used to help predict the results of genetic crosses
an allele that produces its characteristic phenotype only when its paired allele is identical
recombinant deoxyribonucleic acid: genetically engineered DNA made by recombining fragments of DNA from different organisms
The inheritance pattern of a phenotype that corresponds to the sex chromosomes (usually the X chromosome in XY species).
sickle cell anemia
a congenital form of anemia occurring mostly in blacks; characterized by abnormal blood cells having a crescent shape
a hereditary disorder of lipid metabolism occurring most frequently in individuals of Jewish descent in eastern Europe; accumulation of lipids in nervous tissue results in death in early childhood)
a distinguishing feature of your personal nature
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