monohybrid crosses

Question 1

monohybrid cross

Answer 1

• cross between parents with different alleles for a single gene

Question 2

genetic diagrams

Answer 2

• show how characteristics are inherited
• show genotype and phenotype of a cross between parents
• generations (p1 , f1, f2)
• alleles shown with capital (dominant) and small (recessive) letters
• represented by two letters

Question 3

punnett square

Answer 3

• represents a cross between two organisms
• predicts probability of genotype and phenotype
• the characteristics of the offspring can be determined by the allele of each gamete
• phenotype, alleles shown (upper case dominant)
• recessive only expressed in offspring when homozygous

Question 4

mendel’s experiment

Answer 4

• mendell tested over 28000 pure-breading pea plants (1856-1863)
• he tried to establish alternative forms of traits
• transferred pollen grains from tall to short pea plants, not allowing for self-pollination
• collected and sowed the seeds
• f1 generation grew to tall plants
• self-pollination for f2 growing to 3/4 were tall
• short characteristics did not disappear