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Biology HL GENETICS

Carlotta Pierleoni

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Across
3.an allele that has the same effect on the phenotype whether it is present in the homozygous or heterozygous state (space)
6.a test made in early pregnancy to detect congenital abnormalities in the fetus
7.having two different alleles of a gene
10.an allele that only has an effect on the phenotype when present in the homozygous state (space)
12.Any of the single-celled or multicellular organisms whose cell contains a distinct, membrane-bound nucleus.
15.Heritable factor that controls a specific characteristic
16.A pair of chromosomes having the same gene sequences, each derived from one parent.(space)
19.a group of basic proteins found in a chromatin
21.pairs of alleles that both affect the phenotype when present in a heterozygote. (space)
22.A cell or an organism consisting of two sets of chromosomes: usually, one set from the mother and another set from the father. In a diploid state the haploid number is doubled, thus, this condition is also known as 2n.
23.(In mitosis) The failure of sister chromatids to separate during and after mitosis. (In meiosis) The failure of homologous chromosomes to segregate or to separate during and after meiosis.
24.the whole of the genentic information of an organism
25.the characteristics of an organism
Down
1.A type of mutation involving replacement or substitution of a single nucleotide base with another in DNA or RNA molecule.
2.one specific form of a gene, differing from other alleles by one or a few bases onlz and occupzing the same gene locus as other ???? of the gene
4.Changes in the nucleotide sequence of the genetic material (i.e. DNA, or RNA, in the case of viruses), which are usually caused by copying errors during replication that further lead to base substitution, insertion, or deletion of one or more base pairs.
5.an individual that has one copy of a recessive allele that causes a genetic diseas in individuals that are homozygous for this allele
7.having two identical alleles of a gene
8.he set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.
9.The number and visual appearance of the chromosomes in the cell nuclei of an organism or species
11.A distinguishing quality, trait or feature of an individual, thing, disorder
13.A threadlike structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes
14.The sampling of amniotic fluid using a hollow needle inserted into the uterus, to screen for developmental abnormalities in a fetus.
17.the particular position on homologous chromosomes of a gene
18.alleles of an organism
20.The central and most important part of an object, movement, or group, forming the basis for its activity and growth.

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