Genetics 1

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complete the following sentence with the most appropriately correct answer. 'The male sperm and the female egg are the only cells in the human or animal body that....'

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How many pairs of chromosomes do humans have?

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who was the first person to describe the genetic mechanism of inheritance?

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In the ABO human blood group system, the A and B alleles are co-dominant. There is a third allele (O) - known as the null allele - where neither A nor b is present. AA or AO individual have blood group a; BB or BO have blood group B; AB individuals have blood group AB and OO individuals have blood group O. In a cross between two parents, one is blood group A (genotype AO) and the other blood group B (genotype BB) what will be the proportion of blood groups of the progeny of this mating (i.e. AO x BB)? (hint draw out the combinations first)

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In the ABO human blood group system, the A and B alleles are co-dominant. There is a third allele (O) - known as the null allele - where neither A nor b is present. AA or AO individual have blood group a; BB or BO have blood group B; AB individuals have blood group AB and OO individuals have blood group O. In a cross between two parents, one is blood group A (genotype AO) and the other blood group B (genotype BB) what will be the proportion of blood groups of the progeny of this mating (i.e. AO x BB)? (hint draw out the combinations first)

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Consider a genetic cross to breed labradors. there are 2 genetic loci that determine the 3 coat colours; black, yellow and chocolate. At one genetic locus, there are 2 alleles E (dominant) and e (recessive) at the other there are also 2 alleles B (dominant) and b (recessive). The 2 loci interact to produce the coat colour. Any dog with at least 1 copy of the dominant allele in both loci (e.g. EEBB or EeBB or EEBb or EeBb) will always be black any dog with ee (e.g. eeBB or eeBb or eebb) will always be yellow; any dog with at least one E allele and bb (e.g. EEbb pr Eebb) will be chocolate. in a cross between black labradors with a genotype of EeBb x EeBb, there are 1 possible genetic combinations: of these how many (out of 16 possible offspring genotypes) are black, chocolate and yellow? (Hint: 1. remember that each gamete will contain one allele from each locus - so the possible alleles from 1 parent are EB or Eb or eB or eb, and of course, the same possible alleles will come from the other parent. 2. draw out the possible genetic combinations first or use a punnet square to help)

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consider a genetic cross between two parents one of whom carries the haemophilia allele. The genotype HH (female) and HY (male) have the wild type (i.e. non-haemophiliac) phenotype, hh (female) and hY (male) have the haemophiliac phenotype. in a cross Hh x HY, what is the proportion of male progeny with haemophilia? (hint: draw out the possible genetic combinations first)

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consider a genetic cross between 2 parents who are heterozygous for the wild type and albino alleles (i.e. Aa x Aa, where AA is wild type; Aa is wild type, aa is albino). what proportion of the progeny will be albino? ( hint draw out the possible genetic combinations first)

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what is the difference between a locus and an allele?

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what do we mean by the term diploid?

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what do we mean by the term autosomes?

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which statements about speciation is not true

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Genetics 1

Question 1 of 1

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complete the following sentence with the most appropriately correct answer. 'The male sperm and the female egg are the only cells in the human or animal body that....'

Select the correct answer(s).

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How many pairs of chromosomes do humans have?

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who was the first person to describe the genetic mechanism of inheritance?

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Select the correct answer(s).

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Select the correct answer(s).

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Select the correct answer(s).

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Select the correct answer(s).

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consider a genetic cross between 2 parents who are heterozygous for the wild type and albino alleles (i.e. Aa x Aa, where AA is wild type; Aa is wild type, aa is albino). what proportion of the progeny will be albino? ( hint draw out the possible genetic combinations first)

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what is the difference between a locus and an allele?

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what do we mean by the term diploid?

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what do we mean by the term autosomes?

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which statements about speciation is not true

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which of the following is the most important genetic mechanism that generates genotypic variation

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Neutral alleles or neutral genotypes

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Diversifying selection acts on a population to...

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