Two plants in a cross were each heterozygous for two gene pairs (ab/ab) whose loci are linked and 20 map units (mu) apart. (recall that 1 mu is equal to 1% recombination between two genes.)
assuming that crossing over occurs during the formation of both male and female gametes and that the a and b alleles are dominant, determine the phenotypic ratio of their offspring.
what proportion of the offspring of two plants ( both (ab/ab)) will be a_b_ if the genes are 20 mu apart?
what proportion of the offspring of two plants ( both (ab/ab)) will be a_bb if the genes are 20 mu apart?
what proportion of the offspring of two plants ( both (ab/ab)) will be aab_ if the genes are 20 mu apart?
what proportion of the offspring of two plants ( both (ab/ab)) will be aabb if the genes are 20 mu apart?

Competition occurs between species when

In a hypothetical breed of dogs, coat color is controlled by two genes. there are six different coat colors in this breed: black, brown, cream, gray, silver, and tan. consider the following crosses. cross 1: black females from a lineage of all black dogs are crossed with brown males from a lineage of all brown dogs. f1 males and females are all black. when f1 are intercrossed, f2 males and females are black or brown. cross 2: black females from a lineage of all black dogs are crossed with tan males from a lineage where all males are tan and all females are cream. f1 males are black, f1 females are gray. when f1 are intercrossed, f2 males and females are black, brown, gray, or tan. cross 3: silver females from a lineage where all females are silver and all males are gray are crossed with brown males from a lineage of all brown dogs. f1 males and females are all gray. when f1 are intercrossed, f2 males are black, brown, gray, or tan, f2 females are cream, gray, silver, or tan. select the correct statements regarding the mode of inheritance of the coat color genes. a) both genes are x-linked. b) both genes are autosomal. c) one of the genes modifies the expression of the other gene. d) each gene has an additive effect on the intensity of coat color. e) each gene independently specifies three colors. f) one of the genes is autosomal, and the other is x-linked.

(select all the correct choose each statement that is scientific. - the opinions of randomly selected participants in a survey prove the idea that global temperatures are not increasing on earth. - the universe's average temperature and rate of expansion support the idea that it began as one super-dense and hot mass 13.8 billion years ago. - ocean tides are caused by the uneven gravitational pulls of the moon and sun on different parts of earth. - human life is more valuable than other forms of life on earth because humans are more intelligent than other organisms.