1. How many blood types are there in the human blood system? 2. What are the genotypes for each blood type? 3. What is the difference between the genotype of homozygous Type A to heterozygous Type A? 4. What is the difference between the genotype of homozygous Type A to heterozygous Type A? 5. What have you noticed about the number of alleles that controls Type A and Type B blood phenotypes? 6. What do you mean by sex-linked inheritance? 7. What do you mean by sex-linked genes? 8. What is the difference between x-linked and y-linked genes? 9. What do you mean by x-linked dominant trait? 10.What do you mean by x-linked recessive trait?
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1.)8 blood groups
There are 4 main blood groups (types of blood) – A, B, AB and O. Your blood group is determined by the genes you inherit from your parents. Each group can be either RhD positive or RhD negative, which means in total there are 8 blood groups.
2.) Table 4-5. Correlation of ABO phenotypes and genotypes.
3.) We all have two alleles, or versions, of each gene. Being homozygous for a particular gene means you inherited two identical versions. It's the opposite of a heterozygous genotype, where the alleles are different. People who have recessive traits, like blue eyes or red hair, are always homozygous for that gene
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6.)The transmission to successive generations of traits that are due to alleles at gene loci on a sex chromosome is called as sex-linked inheritance.
7.) Sex-linked, as related to genetics, refers to characteristics (or traits) that are influenced by genes carried on the sex chromosomes. In humans, the term often refers to traits or disorders influenced by genes on the X chromosome, as it contains many more genes than the smaller Y chromosome.
8.) A characteristic of X-linked inheritance is that fathers cannot pass X-linked traits to their sons (no male-to-male transmission). A condition is considered Y-linked if the altered gene that causes the disorder is located on the Y chromosome, one of the two sex chromosomes in each of a male's cells
9.) X-linked dominant inheritance is a way a genetic trait or condition can be passed down from parent to child through mutations (changes) in a gene on a single X chromosome. In females (who have two X chromosomes), a mutation in a gene on one of the X chromosomes is enough to cause the condition.
10.) X-linked recessive inheritance is a way a genetic trait or condition can be passed down from parent to child through mutations (changes) in a gene on the X chromosome. In males (who only have one X chromosome), a mutation in the copy of the gene on the single X chromosome causes the condition.
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