Genetics

Joanne North
Quiz by Joanne North, updated more than 1 year ago
Joanne North
Created by Joanne North about 4 years ago
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Description

AQA 2016

Resource summary

Question 1

Question
Match the definition with the word The genetic makeup of an organism.
Answer
  • Phenotype
  • Gene
  • Genotype

Question 2

Question
Match the definition with the word The observable or biochemical characteristic of an organism.
Answer
  • Genotype
  • Phenotype
  • Gene

Question 3

Question
Match the definition to the word A length of DNA that is a sequence of nucleotide bases that code for a particular polypeptide.
Answer
  • Phenotype
  • Genotype
  • Gene

Question 4

Question
Match the definition with the word One of the different forms of a gene.
Answer
  • Phenotype
  • Gene
  • Allele

Question 5

Question
What is homozygous dominant?
Answer
  • Where there is two dominant alleles
  • Where there is two recessive alleles

Question 6

Question
What is homozygous recessive?
Answer
  • Where there are two dominant alleles
  • Where there is a dominant and recessive allele
  • Where there is two recessive alleles

Question 7

Question
What is a codominant allele?
Answer
  • Where there is a dominant and recessive allele
  • Where two alleles both contribute to the phenotype so both features are represented
  • Where the recessive alleles are only present in the phenotype

Question 8

Question
Representing Genetic Crosses 1) Choose a single letter to represent each characteristic. This makes it [blank_start]easier as it is in short hand[blank_end]. 2) Choose the first letter of one of the contrasting features. This makes it [blank_start]easier to identify which characteristic[blank_end] is being used. 3) Choose a letter which the higher and lower case differs in size and shape. This [blank_start]makes it hard to confuse the letters[blank_end]. 4) Higher cases represent the [blank_start]dominant feature[blank_end], lower case letters represent the [blank_start]recessive feature[blank_end]. 5) Represent the parents with appropriate pairs of letters and state their [blank_start]phenotypes[blank_end]. 6) State the gametes produced and circle them. This [blank_start]reinforces that they are separate[blank_end]. 7) Use a [blank_start]Punnett square[blank_end] to show the results of random crossing and label male and female. This makes it [blank_start]less likely to make an error.[blank_end] 8) State the phenotypes of each different genotype and always put the higher case first. This [blank_start]reduces error when reading[blank_end].
Answer
  • easier as it is in short hand
  • easier to identify which characteristic
  • makes it hard to confuse the letters
  • dominant feature
  • recessive feature
  • phenotypes
  • reinforces that they are separate
  • Punnett square
  • less likely to make an error.
  • reduces error when reading
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