Punnett Squares
Cross a heterozygous man with a homozygous recessive woman. The man has brown eyes and the woman has blue.
What percent of their offspring will have brown eyes?
75 percent
Two brown-eyed parents have a blue-eyed child. What must be true?
Both parents are heterozygous
What are terminator seeds?
Seeds that can't produce their own offspring
Cross a heterozygous man with a homozygous recessive woman. The man has brown eyes and the woman has blue.
What percent of their offspring will have blue eyes in their genotype?
100 percent
This is the term that refers to the physical characteristics that are studied in genetics.
What is a trait?
The number of chromosomes a human receives from their mom
23
What does GMO stand for?
Genetically modified organism
Down syndrome is a common disease caused by a mutation on which chromosome?
Chromosome 21
A mother has blood type A and is genotype AO. The father has blood type B and is genotype BO.
What percent of their children will carry the o gene in their genotype
75 percent
If CRISPR technology is developed further, what would likely be the first thing scientists would want to make CRISPR do?
Eliminate disease
This is the process where a person breeds animals or plants together that have desirable traits. For example: breeding friendly dogs to make a friendly dog breed
Selective Breeding
Two parents both have blood type A, but they have a child with blood type O.
What must the genotypes of the parents be?
What is the probability of having a child with type O?
25 percent
Two different forms of a gene are called this.
What are alleles?
Why cant male cats be calico?
Because the gene for color is inherited on the X chromosome and to be calico a cat must have two different color genes (one on each x chromosome). Boys only have one x chromosome.
Why is it helpful to have crops that aren't killed by weed killer sprays?
Because then the sprays will kill weeds and allow more nutrients to be absorbed by the crops themselves
A red-eyed female (XᴿXʷ) is crossed with a white-eyed male (XʷY). (Red = dominant, White = recessive, X-linked)
25 percent
If a woman is homozygous recessive for blue eyes, what is her genotype?
bb
If two people who are albino have a child what is the chance that their child will also have albinism? Explain your answer.
100% because albinism is homozygous recessive
Explain how a GMO plant that is poisonous to insects is okay to be eaten by people
Because poison depends on the species. What is poison to an insect won't necessarily be poison to a human