Biology - Genetics Problems (Set 2)

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another human trait that shows a similar inheritance pattern and frequency of distribution is


what are the possible phenotypes of offspring produced between two pink-flowered four o'clock plants?

white- flowered,red-flowered, an pink-flowered

how many different phenotypes can be produced by a pair of codominant alleles?


a trait controlled by four alleles is used to have

multiple alleles

how many different allele combinations would be found in the gametes produced by a pea plant whose genotype was RrYY?


what is the probability that the offspring of a homozygous dominant individual and a homozygous recessive individual will exhibit the dominant phenotype?


when mendel crossed pea plants with two contrasting traits, such as flower color and plant height,

he found that the inheritance of on trait did not influence the inheritance of the other trait

situations in which one allele for a gene is not completely dominant over another allele for that gene are called

incomplete dominance

the difference between a monohybrid cross and dihybrid cross is that

monohybrid crosses involve self-pollination, while dihybrid crosses involve cross-pollination

the passing of traits from parents to offspring is called


a cross between a white rooster and a black hen results in 100% blue Andalusian offspring. When two of these blue offspring are mated, the probably phenotypic ration seen in their offspring would be

25% black, 50% blue and 25% white

a man heterozygous for blood type A marries a woman heterozygous for blood type B. the chance that their first child will have type O blood is


what fraction of the offspring resulting from a heterozygous x heterozygous for both traits?


in mendel's experiment, the probability that an F2 plant would be tall was


mendel obtained his P generation by allowing the plants to


the principles that probability can be used to

predict the traits of the offspring produced by genetic crosses

what is the expected phenotypic ration resulting from a homozygous dominant x heterozygous monohybrid cross?


which of the following traits is controlled by multiple alleles in humans?

blood type

and individual heterozygous for a trait and an individual homozygous recessive for the trait are crossed and produce many offspring that are

of two different phenotypes

when roan cattle are mated, 25% of the offspring are red, 50% are roan, and 25% are white. Upon examination, it can be seen that the coat of a roan cow consists of both red and white hairs, this trait is one controlled by

codominant alleles

a cross of a red cow with a white bull produces all roan offspring. This type of inheritance is known as


true-breeding pea plants always

produce offspring with only one form of a trait

in pea plants, yellow seeds are dominant over green seeds. What would be the expected genotype ratio in a cross between a plant with green seeds and a plant that is heterozygous for seed color


the type of inheritance shown when a red-flowering plant is crossed with a white-flowering plant and only pink-flowering plants are produced is

incomplete dominance

what fraction of the offspring resulting from a heterozygous x heterozygous dihybrid cross are homozygous recessive for both traits?


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