in a mammal, how many inactivated x chromosomes would be present in individuals of XO phenotype? A) 0 B) 1 C) 2

In humans, the recessive allele that causes a form of red-green colour blindness (c) is found on the X chromosome. a.) Determine the genotypes and phenotypes of the F1 generation from a colour-blind father and a mother who is homozygous for normal colour vision. b.) Determine the genotypes and phenotypes of the F1 generation from a father who has normal colour vision and a mother who is heterozygous for colour vision. c.) Draw a Punnett square to determine the genotypes of parents that could produce a daughter who is colour-blind

No need to explain 1.) The phenomenon in which gene present on the same chromosome remain together as gametes are produced is knows as A.) non-disjunction B.) cross-over C.) synapsis D.) linkage 2.) Queen Victoria was a carrier of hemophilia, but there is no record of the disease in any of her ancestors. It is reasonable to suggest that she became a carrier of hemophilia as a result of A.) recombination B.) a mutation C.) inbreeding D.) crossing over 3.) How many primary spermatocytes and primary Oo Yates are required to produced 100 sperm and 100 eggs? A.) 25 primary spermatocytes and 25 primary oocytes B.) 100 primary spermatocytes and 100 primary oocytes C.) 25 primary spermatocytes and 100 primary oocytes D.) 100 primary spermatocytes and 25 primary oocytes

Create a chromosome map for each set of three genes from the given information. b) the crossover frequency between gene X and gene Z is 8.5 %, the crossover frequency between gene Y and gene Z is 2.25 % and between gene Y and gene X is 6.25 %

Which type(s) of chromosomal aberrations result from chromosomal breaks on different chromosomes? Assume that a heterozygote for the aberration is viable. Select all correct answers. A.)Robertsonian translocation B.)reciprocal translocation C.)tandem duplication D.)paracentric inversion E.)pericentric inversion F.)large deletion