18 Questions
What is the likely genotype of the parents in a cross that yields a 3:1 ratio of a particular trait in the offspring?
Heterozygous
How many unique combinations of maternal and paternal chromosomes can be produced in a species with a haploid number of 23 chromosomes?
About 8 million
An individual in a diploid species can possess up to how many alleles for a particular gene?
Two
What is the result of meiosis I in a diploid organism?
Homologous chromosomes are separated
What is the term for the phenomenon where the phenotype of the offspring is a combination of the parental phenotypes?
Incomplete dominance
What stage of cell division is characterized by 5 total chromosomes and 10 sister chromatids in a diploid organism with 10 chromosomes?
Prophase II
In a cross between brown rabbits with deformed legs and white rabbits with deformed legs, what proportion of offspring would be expected to inherit the deformed leg trait?
25%
What is the function of homologous chromosomes in meiosis?
Carry the same genes that code for the same traits
A man with normal color vision has a color-blind daughter. What is the genotype of the mother?
XNXn
An individual with a mutation on chromosome 3 has children with two X chromosomes and a chromosome 3 with the SRY gene. What is the likely gonadal sex of these children?
Male
A man with extra digits (six fingers on each hand and six toes on each foot) has a child with extra digits. What is the probability that their next child will have extra digits?
½
What is true about the DNA in one of your brain cells compared to one of your heart cells?
The DNA is identical
What is the primary advantage of sexual reproduction in plants?
Increased genetic diversity for adaptation
In a cross between a female fruit fly with cinnabar eyes and a wild-type male, what is the expected phenotype of the F1 females?
Half will have cinnabar eyes and half will have wild-type eyes
What is the purpose of the distilled water sample in the scientist's experiment?
To serve as a negative control for the experiment
What is the genotype ratio of the F2 generation in Mendel's cross between yellow-seeded and green-seeded pea plants?
3:1
What is the relationship between the codons UUU and UUC in the genetic code?
They code for the same amino acid
What is the intermediate molecule in the central dogma?
mRNA
Solve these multiple-choice questions to test your understanding of genetics, including inheritance patterns and chromosome combinations.
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